Los Angeles, CA

Compiled by PlainEnviro · August 25, 2026

High Risk (99/100)

Transparent derived index from EPA TRI / SDWIS / Superfund extracts: not an official EPA rating. Fixed caps: facilities ≤25 pts (50+ = max), log10 releases ≤25 pts, Superfund ≤25 pts (5/site), health-violation systems ≤15 pts (3/system), high-chemical facilities ≤10 pts. Bands: High ≥60, Moderate ≥30. See methodology. This is a different measure than the EJ Screening score for this county, which ranks it by percentile against other tracked counties rather than against these fixed caps.

Environmental data for Los Angeles in California · Population: 9,848,406

TRI sites such as Ecobat Resources California Inc.; Chevron Products Co. Div of Chevron USA Inc.; Tesoro Los Angeles Refinery-Carson Operations; SDWIS systems such as LOS ANGELES-CITY, DEPT. OF WATER & POWER; LONG BEACH UTILITIES DEPARTMENT; SANTA CLARITA VALLEY WATER AGENCY; NPL sites such as Cooper Drum Company; Del Amo; Exide Technologies - Vernon anchor Los Angeles, CA's EPA extract. Derived burden score 99/100 (High Risk) uses fixed national caps on density, log release volume, Superfund count, and health-flagged systems - not an official EPA rating.

EPCRA disclosures in Los Angeles total 41.4M lbs; health-flagged SDWIS rows include LOS ANGELES-CITY, DEPT. OF WATER & POWER; DOWNEY - CITY, WATER DEPT.; MONTEREY PARK-CITY, WATER DEPT., while Ecobat Resources California Inc. leads TRI pounds. AQS median AQI 80 / peak 230 in 2024.

Largest TRI sites in the extract: Ecobat Resources California Inc.; Chevron Products Co. Div of Chevron USA Inc.; Tesoro Los Angeles Refinery-Carson Operations. Named SDWIS systems: LOS ANGELES-CITY, DEPT. OF WATER & POWER; LONG BEACH UTILITIES DEPARTMENT; SANTA CLARITA VALLEY WATER AGENCY. NPL sites on record: Cooper Drum Company; Del Amo; Exide Technologies - Vernon. Burden score 99/100 (High Risk) is the only weighted composite here; tables reproduce EPA disclosure history, not a current-safety verdict.

Same facilities, both years

-3.0%

324 facilities that filed in 2022 and 2023

Whole inventory

-2.5%

8.8 million lb → 8.6 million lb, every facility that filed

Between the two reporting years, 10 facilities filed for the first time and 17 stopped filing. Facilities entering or leaving the inventory are excluded from the same-facility comparison above.

Los Angeles, CA's total reported releases fell from 8.7 million lb in 2022 to 8.4 million lb in 2023, based on EPA TRI filings.
Los Angeles, CA's land releases rose from 204.4 thousand lb in 2022 to 272.6 thousand lb in 2023, based on EPA TRI filings.
Los Angeles, CA's air releases fell from 2.4 million lb in 2022 to 2.1 million lb in 2023, based on EPA TRI filings.
Los Angeles, CA's water releases fell from 1.9 million lb in 2022 to 1.7 million lb in 2023, based on EPA TRI filings.

County population (Census ACS)

9,848,406

TRI Facilities

Water Systems

243

Superfund Sites

Total Releases

41.4M lbs

Air Quality History (2020–2024)

EPA Air Quality Index (AQI) data showing how many days per year fall into each air quality category.

Year	Good	Moderate	Unhealthy (SG)	Unhealthy	Median AQI	Max AQI
2024	38 (10%)	195	78	55	80	230
2023	41 (11%)	237	52	35	67	210
2022	17 (5%)	254	65	29	74	209
2021	9 (2%)	259	70	27	79	281
2020	35 (10%)	194	77	60	85	250

2024 Good Air Quality: 10% of days

Unhealthy days: 133

Median AQI: 80

Source: EPA Air Quality System (AQS) Annual AQI by County AQI categories: Good (0-50), Moderate (51-100), Unhealthy for Sensitive Groups (101-150), Unhealthy (151-200), Very Unhealthy (201-300), Hazardous (301+)

For real-time air quality readings and pollutant breakdowns in California, see the EPA's AirNow.gov.

Water Systems (243)

System	City	Source	System pop (SDWIS)	Violations	Health
LOS ANGELES-CITY, DEPT. OF WATER & POWER	Los Angeles	Surface Water	3,875,566	10	Yes
LONG BEACH UTILITIES DEPARTMENT	Long Beach	Surface Water	466,772	0	–
SANTA CLARITA VALLEY WATER AGENCY	Newhall	Surface Water	294,090	0	–
GSWC - SOUTHWEST	Hawthorne	Surface Water	277,740	0	–
LOS ANGELES CWWD 40 REG 4 & 34 LANCASTER	Alhambra	Surface Water	208,129	0	–
GLENDALE-CITY, WATER DEPT.	Glendale	Surface Water	188,784	0	–
SUBURBAN WATER SYSTEMS-SAN JOSE	Covina	Surface Water	168,843	0	–
PASADENA WATER AND POWER	Pasadena	Surface Water	164,344	0	–
POMONA - CITY, WATER DEPT.	Pomona	Surface Water	151,713	0	–
PALMDALE WATER DIST.	Palmdale	Surface Water	126,804	0	–
DOWNEY - CITY, WATER DEPT.	Downey	Groundwater	110,556	5	Yes
AZUSA LIGHT AND WATER	Azusa	Surface Water	110,044	0	–
TORRANCE-CITY, WATER DEPT.	Torrance	Surface Water	106,183	0	–
WALNUT VALLEY WATER DISTRICT	Walnut	Surface Water	100,941	0	–
SANTA MONICA-CITY, WATER DIVISION	Los Angeles	Surface Water	89,947	0	–
INGLEWOOD- CITY, WATER DEPT.	Inglewood	Surface Water	80,824	0	–
CITY OF ALHAMBRA	Alhambra	Surface Water	79,776	0	–
SOUTH GATE-CITY, WATER DEPT.	South Gate	Surface Water	76,443	0	–
COMPTON-CITY, WATER DEPT.	Compton	Surface Water	74,877	0	–
LIBERTY UTILITIES - BELLFLOWER-NORWALK	Downey	Surface Water	72,624	0	–
LAS VIRGENES MWD	Calabasas	Surface Water	72,602	0	–
VALLEY COUNTY WATER DIST.	Baldwin Park	Groundwater	68,871	0	–
LYNWOOD-CITY, WATER DEPT.	Lynwood	Surface Water	66,967	0	–
CAL AMERICAN WATER CO	Rosemead	Surface Water	66,809	0	–
LAKEWOOD - CITY, WATER DEPT.	Lakewood	Groundwater	66,135	0	–
SUBURBAN WATER SYSTEMS-WHITTIER	Covina	Groundwater	66,045	0	–
LIBERTY UTILITIES (AV RANCHOS) CORP.	Downey	Groundwater	64,469	0	–
MONTEREY PARK-CITY, WATER DEPT.	Monterey Park	Groundwater	62,183	1	Yes
SUBURBAN WATER SYSTEMS-LA MIRADA	Covina	Surface Water	56,793	0	–
GSWC-SAN DIMAS	San Dimas	Surface Water	56,538	0	–
ROWLAND WATER DISTRICT	Rowland Heights	Surface Water	56,100	0	–
PARAMOUNT - CITY, WATER DEPT.	Paramount	Surface Water	55,200	0	–
CITY OF ARCADIA	Arcadia	Groundwater	51,361	0	–
WHITTIER-CITY, WATER DEPT.	Whittier	Groundwater	49,954	0	–
GLENDORA-CITY, WATER DEPT.	Glendora	Surface Water	49,934	0	–
CAL/AM WATER COMPANY - SAN MARINO	Rosemead	Surface Water	47,995	0	–
CERRITOS - CITY, WATER DEPT.	Cerritos	Surface Water	47,475	0	–
BELLFLOWER - SOMERSET MWC	Bellflower	Surface Water	46,300	0	–
PICO RIVERA - CITY, WATER DEPT.	Pico Rivera	Groundwater	40,600	0	–
BEVERLY HILLS-CITY, WATER DEPT.	Beverly Hills	Surface Water	40,121	0	–
GSWC - CLAREMONT	San Dimas	Surface Water	39,730	0	–
SAN GABRIEL COUNTY WD	Rosemead	Groundwater	39,345	0	–
GSWC - CULVER CITY	Santa Fe Springs	Surface Water	38,233	0	–
MONROVIA-CITY, WATER DEPT.	Monrovia	Groundwater	37,931	0	–
CRESCENTA VALLEY CWD	La Crescenta	Surface Water	35,841	0	–
GOLDEN STATE WATER COMPANY - ORCUTT	Hawthorne	Surface Water	34,102	0	–
COVINA-CITY, WATER DEPT.	Covina	Surface Water	33,300	0	–
MANHATTAN BEACH-CITY, WATER DEPT.	Manhattan Beach	Surface Water	32,697	0	–
LOS ANGELES CWWD 29 & 80-MALIBU	Alhambra	Surface Water	32,348	0	–
LA VERNE, CITY WD	La Verne	Surface Water	31,334	2	Yes
CALIF STATE POLYTECHNICAL UNIV - POMONA	Pomona	Surface Water	29,854	9	Yes
VERNON-CITY, WATER DEPT.	Vernon	Surface Water	28,112	0	–
FORT BLISS MAIN POST AREA	San Dimas	Groundwater	28,000	0	–
GSWC-SOUTH ARCADIA	San Dimas	Groundwater	27,072	0	–
MONTEBELLO LAND & WATER CO.	Montebello	Groundwater	26,554	0	–
LIBERTY UTILITIES - COMPTON	Downey	Surface Water	26,371	0	–
GSWC-SOUTH SAN GABRIEL	San Dimas	Surface Water	26,240	0	–
CITY OF SOUTH PASADENA	South Pasadena	Surface Water	25,329	0	–
SUNNY SLOPE WATER CO.	Pasadena	Groundwater	25,252	0	–
ORCHARD DALE WATER DISTRICT	Whittier	Groundwater	25,000	0	–
CAL-AM WATER COMPANY - DUARTE	Rosemead	Groundwater	24,773	0	–
LIBERTY UTILITIES - LYNWOOD	Downey	Surface Water	24,701	0	–
SAN FERNANDO-CITY, WATER DEPT.	San Fernando	Groundwater	23,946	0	–
EL MONTE-CITY, WATER DEPT.	El Monte	Groundwater	22,968	0	–
PICO WD	Pico Rivera	Groundwater	22,051	0	–
CAL/AM WATER COMPANY - BALDWIN HILLS	Rosemead	Surface Water	20,724	0	–
NORWALK - CITY, WATER DEPT.	Norwalk	Surface Water	20,283	0	–
LOMITA-CITY, WATER DEPT.	Lomita	Surface Water	20,256	1	Yes
SANTA FE SPRINGS - CITY, WATER DEPT.	Santa Fe Springs	Surface Water	19,219	0	–
QUARTZ HILL WATER DIST.	Quartz Hill	Surface Water	19,100	0	–
EL SEGUNDO-CITY, WATER DEPT.	El Segundo	Surface Water	16,445	0	–
WALNUT PARK MUTUAL WATER CO.	Huntington Park	Groundwater	16,180	0	–
LINCOLN AVENUE WATER CO.	Altadena	Surface Water	16,088	0	–
HUNTINGTON PARK-CITY, WATER DEPT.	Huntington Park	Surface Water	15,437	0	–
SOUTH MONTEBELLO IRRIGATION DIST.	Montebello	Groundwater	15,021	0	–
EAST BIGGS WATER SYSTEM	San Dimas	Surface Water	15,000	0	–
TRACT 180 MUTUAL WATER CO.	Cudahy	Groundwater	14,000	0	–
LOS ANGELES CWWD 40, REG. 38-LAKE LA	Alhambra	Surface Water	12,568	0	–
SIGNAL HILL - CITY, WATER DEPT.	Signal Hill	Surface Water	11,848	11	Yes
LOS ANGELES CWWD 40, R 24,27,33-PEARBLSM	Alhambra	Surface Water	11,509	0	–
CITY OF BELL GARDENS	Downey	Surface Water	11,437	0	–
SIERRA MADRE-CITY, WATER DEPT.	Sierra Madre	Surface Water	11,000	0	–
VALLEY WATER CO.	La Canada Flintridge	Surface Water	10,070	0	–
CAL-AM WATER COMPANY - EAST PASADENA	Rosemead	Groundwater	9,949	0	–
RUBIO CANON LAND & WATER ASSOCIATION	Altadena	Surface Water	9,215	0	–
TRACT 349 MUTUAL WATER CO.	Cudahy	Groundwater	8,700	0	–
LA PUENTE VALLEY CWD	La Puente	Groundwater	8,243	0	–
VALENCIA HEIGHTS WATER CO.	West Covina	Surface Water	7,775	0	–
GSWC - CALIPATRIA	San Dimas	Surface Water	7,363	0	–
PETER PITCHESS HONOR RANCHO DETN. CTR	Castaic	Groundwater	7,000	0	–
LOS ANGELES CWWD 36-VAL VERDE	Alhambra	Surface Water	6,376	0	–
MAYWOOD MUTUAL WATER CO. #2	Maywood	Surface Water	6,349	0	–
CITY OF INDUSTRY WATERWORKS SYSTEMS	La Puente	Groundwater	6,158	0	–
MAYWOOD MUTUAL WATER CO. #3	Maywood	Surface Water	6,059	0	–
BELLFLOWER MUNICIPAL WATER SYSTEM	Rosemead	Surface Water	5,999	0	–
GOLDEN STATE WATER COMPANY - LOS OSOS	Hawthorne	Groundwater	5,924	0	–
PALM RANCH IRRIGATION DIST.	Quartz Hill	Surface Water	5,507	0	–
MAYWOOD MUTUAL WATER CO. #1	Huntington Park	Surface Water	5,500	0	–
SUBURBAN WATER SYSTEMS-GLENDORA	Covina	Surface Water	5,249	0	–
LAS FLORES WATER CO.	Altadena	Surface Water	4,847	0	–
LOS ANGELES CWWD 37-ACTON	Alhambra	Surface Water	4,805	0	–
VALLEY VIEW MUTUAL WATER CO.	Baldwin Park	Groundwater	4,613	0	–
SUBURBAN WATER SYSTEMS - SATIVA	Covina	Surface Water	4,363	1	Yes
SO. CAL. EDISON CO.-SANTA CATALINA	Avalon	Surface Water	3,822	0	–
AMARILLO MUTUAL WATER COMPANY	Rosemead	Groundwater	3,134	0	–
LITTLEROCK CREEK IRRIGATION DIST.	Littlerock	Groundwater	3,040	0	–
FORT BLISS BIGGS ARMY AIRFIELD	San Dimas	Groundwater	2,961	0	–
LAND PROJECTS MUTUAL WATER CO.	Lancaster	Groundwater	2,800	118	Yes
CAL AMERICAN WC - LAS POSAS ESTATES	Rosemead	Surface Water	2,039	0	–
CAL AMERICAN WATER COMPANY - PIRU	Rosemead	Groundwater	2,003	0	–
KINNELOA IRRIGATION DIST.	Pasadena	Groundwater	1,960	0	–
GOLDEN STATE WATER COMPANY - TANGLEWOOD	Hawthorne	Surface Water	1,947	0	–
LAKE ELIZABETH MUTUAL WATER CO.	Elizabeth Lake	Surface Water	1,790	1	Yes
CAL AMERICAN WC - RIO PLAZA	Rosemead	Groundwater	1,709	0	–
MT BALDY HOMEOWNERS ASSN.	Mt. Baldy	Groundwater	1,700	6	Yes
LIBERTY UTILITIES - MESA CREST	Downey	Surface Water	1,619	0	–
WHITE FENCE FARMS MWC NO. 1	Palmdale	Surface Water	1,518	6	Yes
LYNWOOD PARK MUTUAL WATER CO.	Compton	Groundwater	1,500	4	Yes
GOLDEN STATE WATER COMPANY - EDNA	Hawthorne	Groundwater	1,493	4	Yes
SUBURBAN WATER SYSTEMS-COVINA KNOLLS	Covina	Surface Water	1,437	0	–
GREEN VALLEY CWD	Green Valley	Groundwater	1,275	1	Yes
SONORA WATER RESOURCES, INC	Claremont	Surface Water	1,154	0	–
BELLFLOWER HOME GARDEN WATER COMPANY	Bellflower	Surface Water	1,129	0	–
LOS ANGELES CWWD 40, REG. 39-ROCK CREEK	Alhambra	Surface Water	994	0	–
LAKE PARK VILLAGE CONDOMINIUMS	Los Angeles	Groundwater	900	0	–
QUAIL HILL MOBILE HOME PARK	Los Angeles	Surface Water	878	0	–
LIBERTY -YERMO	Downey	Groundwater	861	24	Yes
WOODSHIRE EAST MOBILE HOME PARK LTD	Los Angeles	Surface Water	751	0	–
VISTA VILLAGE MHP	Los Angeles	Surface Water	750	1	Yes
BIG OAK MHP	West Hollywood	Groundwater	726	29	Yes
LOS ANGELES CWWD 21-KAGEL CANYON	Alhambra	Surface Water	708	0	–
DEL RIO MUTUAL	El Monte	Groundwater	700	1	Yes
CAL AMERICAN - YERBA BUENA	Rosemead	Groundwater	690	0	–
HEMLOCK MUTUAL WATER CO.	El Monte	Groundwater	686	1	Yes
ARBOR VILLAGE	West Covina	Groundwater	670	7	Yes
LILY OF THE VALLEY MOBILE VILLAGE	Saugus	Groundwater	657	0	–
LOS ANGELES CWWD 40, REG. 35-N.E. L.A.	Alhambra	Groundwater	612	0	–
SNOWCREST HEIGHTS IMP ASSOC	Mount Baldy	Groundwater	600	0	–
MECKS WHISPERING PINES II LLC	West Covina	Groundwater	598	0	–
SHERWOOD FOREST MHP PWS	West Covina	Groundwater	578	2	Yes
LLANO DEL RIO WATER COMPANY	Llano	Groundwater	545	1	Yes
SHERWOOD MOBILE HOME PARK	Lancaster	Groundwater	540	0	–
WESTSIDE PARK MUTUAL WATER	Palmdale	Groundwater	495	0	–
GLENWOOD MOBILE ESTATES	Los Angeles	Groundwater	468	0	–
GOLDEN SANDS MOBILE HOME PARK	Rosemead	Groundwater	450	1	Yes
ANTELOPE PARK MUTUAL WATER COMPANY	Lancaster	Groundwater	445	0	–
RIVIERA TERRACE TC	Encino	Groundwater	435	6	Yes
GUN RIVER MOBILE ESTATES	West Covina	Groundwater	415	0	–
MOUNTAIN GATE ESTATES MHP	Beverly Hills	Groundwater	400	0	–
BRADY HILLS ML	West Covina	Groundwater	400	0	–
PARADISE RANCH MHP	Beverly Hills	Groundwater	360	0	–
LAKE MORENA VIEWS MWC	Pasadena	Groundwater	360	29	Yes
ARROWHEAD LAKE MHP	West Covina	Groundwater	327	0	–
SIERRA WATER RESOURCES - SIERRA CITY	Claremont	Groundwater	324	0	–
MOUNTAIN VIEW TRAILER COURT	Los Angeles	Groundwater	320	0	–
RECREACRES MHC LLC	West Covina	Groundwater	320	1	Yes
OWENS VALLEY WATER RESOURCES, INC.	Claremont	Groundwater	311	0	–
SUNNYLANE ESTATES	Marina Del Rey	Groundwater	300	4	Yes
BROOKVIEW MHP	Los Angeles	Groundwater	300	0	–
LAKE JODIE WATER SYSTEM	West Hollyhood	Groundwater	250	1	Yes
LLANO MUTUAL WATER COMPANY	Llano	Groundwater	245	1	Yes
MUSCATINE MHP LLC	Los Angeles	Groundwater	245	0	–
SPV WATER COMPANY	Valencia	Groundwater	211	0	–
VICTORY VILLAGE MHC, LLC	Burbank	Groundwater	200	0	–
WESTERN SKIES MOBILE HOME PARK	Lancaster	Groundwater	198	0	–
STERLING MUTUAL WATER COMPANY	El Monte	Groundwater	198	6	Yes
STONEGATE MOBILE HOME PARK	Los Angeles	Groundwater	196	0	–
ACORN VILLAGE MOBILE HOME PARK	Pasadena	Surface Water	192	0	–
TOLAS WATERWORKS CO OP	Pasadena	Groundwater	190	0	–
WATERVIEW MOBILE HOME PARK	Calabasas	Groundwater	189	1	Yes
MELROSE MHP	Torrance	Groundwater	186	0	–
SHADY OAKS MOBILE HOME PARK	El Segundo	Groundwater	185	11	Yes
LOS ANGELES RESIDENTIAL COMMUNITY FOUNDA	Santa Clarita	Surface Water	184	1	Yes
THE OAKS MOBILE HOME PARK	Bevery Hills	Groundwater	180	0	–
SWANTON MEADOWS	West Covina	Groundwater	180	3	Yes
ALPINE SPRINGS MOBILE HOME PARK	Palmdale	Groundwater	175	1	Yes
GROVE ESTATES MHP	Los Angeles	Groundwater	162	0	–
METTLER VALLEY MUTUAL	Lancaster	Groundwater	160	72	Yes
SLEEPY VALLEY WATER COMPANY	Santa Clarita	Groundwater	160	4	Yes
LIBERTY-BELLVIEW HEIGHTS	Downey	Groundwater	155	0	–
MILTON MANOR MHP	La Verne	Surface Water	154	0	–
GUN RIVER ESTATES WEST	West Covina	Groundwater	152	1	Yes
SUBURBAN ESTATES MHP	Los Angeles	Groundwater	150	0	–
MWD OF SO CAL GENE PLANT	La Verne	Surface Water	135	0	–
WILSONA GARDENS MUTUAL	Lancaster	Groundwater	129	0	–
SAN ANTONIO CANYON MSC	Mt. Baldy	Groundwater	119	0	–
OAK GROVE MOBILE HOME PARK	Bell Canyon	Groundwater	109	3	Yes
SCE/BIG CREEK POWERHOUSE 1	Rosemead	Surface Water	104	4	Yes
NORTH TRAILS MUTUAL WATER COMPANY	Agua Dulce	Groundwater	100	20	Yes
DILLINGHAM RANCH	Beverly Hills	Groundwater	100	0	–
RIO VISTA MHP	Studio City	Surface Water	100	0	–
FOREST EDGE APARTMENTS LLC	Santa Monica	Groundwater	100	0	–
COVINGTON MILL MWC-DIVISION B	Tujunga	Groundwater	99	1	Yes
EVERGREEN MUTUAL WATER COMPANY	Lancaster	Groundwater	98	0	–
LINDEN MANOR MHP	La Verne	Surface Water	84	0	–
CAMP WILLIAMS-RESORT WATER	Manhattan Beach	Groundwater	80	0	–
LANCASTER WATER COMPANY	Lancaster	Groundwater	80	2	Yes
SHADY REST RV PARK AND CAMPGROUND	Castaic	Groundwater	80	18	Yes
COUNTRY VIEW MOBILE HOME COMMUNITY LLC	Los Angeles	Groundwater	80	6	Yes
GOLDEN VALLEY MOBILE HOME PARK	Los Angeles	Groundwater	80	0	–
TIERRA BONITA MUTUAL WATER	Lancaster	Groundwater	75	0	–
KERN MOBILE ESTATES LLC	Los Angeles	Groundwater	73	79	Yes
THE VILLAGE MOBILE HOME PARK	Valencia	Groundwater	71	52	Yes
NEW MEADOWS	Palos Verdes Estates	Groundwater	70	1	Yes
FENNER CANYON YOUTH CONSERVATION CAMP	Valyermo	Groundwater	65	1	Yes
ANTELOPE VALLEY MOBILE ESTATES	South Pasadena	Groundwater	60	2	Yes
DESERT VIEW TRAILER PARK	La Verne	Groundwater	60	1	Yes
THE PAINTED TURTLE CAMP	Lake Hughes	Groundwater	57	1	Yes
SOUTHFORD MOBILE HOME PARK	Agoura Hills	Groundwater	57	1	Yes
BLUE SKIES TRAILER PARK	Arcadia	Groundwater	56	1	Yes
WINTERHAVEN MOBILE ESTATES	Lake Hughes	Groundwater	56	41	Yes
LITTLE BALDY WATER	Llano	Groundwater	55	1	Yes
EDANNES MOBILE HOME PARK	Hermosa Beach	Groundwater	55	1	Yes
LOS ANGELES, CITY OF - POWER PLANT #2	Los Angeles	Surface Water	44	1	Yes
HERMON MHP LLC	Valley Village	Groundwater	43	0	–
BLEICH FLATS MUTUAL	Lancaster	Groundwater	42	3	Yes
COLORADO MUTUAL WATER COMPANY	Lancaster	Groundwater	39	1	Yes
SCE BISHOP CREEK PLANT 4	Rosemead	Groundwater	38	0	–
MWD OF SO CAL IRON MOUNTAIN	La Verne	Surface Water	36	0	–
THE RIVER COMMUNITY	Azusa	Groundwater	35	1	Yes
RIVERS END TRAILER PARK	Agoura Hills	Groundwater	35	1	Yes
SUNNY ROAD WATER SYSTEM	El Monte	Groundwater	34	51	Yes
RYANS LOT	Hermosa Beach	Groundwater	34	2	Yes
Curtis Flats	Sherman Oaks	Groundwater	33	0	–
CONTROL GORGE POWER PLANT LADWP	Los Angeles	Surface Water	32	0	–
LOS ANGELES, CITY OF - POWER PLANT #1	Los Angeles	Surface Water	29	1	Yes
MESCAL CREEK WATER, INC	Llano	Surface Water	25	1	Yes
VALHALLA WATER ASSOCIATION	Tujunga	Groundwater	25	1	Yes
SANTA YNEZ ROBLAR MOBILE HOME PARK	La Canada	Groundwater	25	0	–
CASA DULCE ESTATES	Agua Dulce	Groundwater	24	0	–
MITCHELL'S AVENUE E MOBILE HOME PARK	Lancaster	Groundwater	24	29	Yes
ROBINSON'S CORNER MHP	Long Beach	Groundwater	20	3	Yes
MWD - EAGLE MOUNTAIN	La Verne	Surface Water	15	0	–
LADWP - INDEPENDENCE	Los Angeles	Groundwater	0	0	–
LADWP - LONE PINE	Los Angeles	Groundwater	0	0	–
LADWP - BIG PINE	Los Angeles	Groundwater	0	0	–
ANTELOPE VALLEY E KERN WTR AGY-ROSAMOND	Palmdale	Surface Water	0	2	Yes
FOOTHILL MUNICIPAL WATER DIST.	La Canada Flintridge	Surface Water	0	0	–
THREE VALLEYS MWD	Claremont	Surface Water	0	0	–
ANTELOPE VALLEY EAST KERN WATER AGENCY	Palmdale	Surface Water	0	0	–
METROPOLITAN WATER DIST. OF SO. CAL.	La Verne	Surface Water	0	0	–
COVINA VALLEY WATER COMPANY - WHOLESALE	West Covina	Surface Water	0	0	–
CALIFORNIA DOMESTIC WATER COMPANY	Whittier	Groundwater	0	0	–

TRI Facilities (50)

#	Facility	City	Industry	Total Releases
1	Ecobat Resources California Inc.	City Of Industry	Primary Metals	9.5M lbs
2	Chevron Products Co. Div of Chevron USA Inc.	El Segundo	Petroleum	9.4M lbs
3	Tesoro Los Angeles Refinery-Carson Operations	Carson	Petroleum	4.8M lbs
4	Torrance Refining Co LLC	Torrance	Petroleum	1.9M lbs
5	Phillips 66 Los Angeles Refinery Wilmington Plant	Wilmington	Petroleum	1.4M lbs
6	US Ecology Vernon Inc.	Vernon	Hazardous Waste	1.2M lbs
7	M. Argueso & Co. Inc.	Rosemead	Chemicals	1.2M lbs
8	Hi-Shear Corp	Torrance	Transportation Equipment	1.0M lbs
9	Coast Plating Inc	Gardena	Fabricated Metals	963.6K lbs
10	Ultramar Inc Wilmington Refinery	Wilmington	Petroleum	762.5K lbs
11	Air Products Manufacturing LLC	Paramount	Chemicals	630.0K lbs
12	Alloys Cleaning Inc	Los Angeles	Fabricated Metals	582.4K lbs
13	Los Angeles Galvanizing Co.	Huntington Park	Fabricated Metals	578.6K lbs
14	George Industries	Los Angeles	Fabricated Metals	522.8K lbs
15	Sgl Technic Inc Polycarbon Di V	Santa Clarita	Electrical Equipment	487.6K lbs
16	Phillips 66 Los Angeles Refinery Carson Plant	Carson	Petroleum	480.7K lbs
17	US Borax Inc.	Wilmington	Chemicals	409.9K lbs
18	Valmont Coatings Calwest Galvanizing	Long Beach	Fabricated Metals	394.2K lbs
19	Press Forge Co	Paramount	Fabricated Metals	353.9K lbs
20	Industrial Service Oil Co	Los Angeles	Hazardous Waste	308.4K lbs
21	Anheuser-Busch LLC	Van Nuys	Beverages	294.4K lbs
22	Saputo Cheese USA Inc	South Gate	Food	294.1K lbs
23	Air Liquide Large Industries U.S. LP - el Segundo	El Segundo	Chemicals	243.0K lbs
24	Western Tube & Conduit Corp	Long Beach	Primary Metals	235.6K lbs
25	Berg Lacquer Co	Los Angeles	Hazardous Waste	232.1K lbs
26	Gb Manufacturing Inc Calif. Acrylic Ind. Inc. (dba Cal Spas)	Pomona	Plastics and Rubber	221.8K lbs
27	Baxalta US Inc. Part of the Takeda Group	Los Angeles	Chemicals	207.4K lbs
28	Phenomenex Inc	Torrance	Computers and Electronic Products	191.0K lbs
29	Polypeptide Laboratories Inc.	Torrance	Chemicals	190.6K lbs
30	Smithfield Packaged Meats Corp.	Los Angeles	Food	177.7K lbs
31	Veolia Es Technical Solutions L.L.C.	Azusa	Hazardous Waste	153.6K lbs
32	Techni-Cast Corp	South Gate	Primary Metals	147.8K lbs
33	Honeywell International Inc	Torrance	Transportation Equipment	139.8K lbs
34	Weber Metals Inc.	Paramount	Fabricated Metals	136.7K lbs
35	White Wave Foods	City Of Industry	Food	122.4K lbs
36	Air Products & Chemicals Inc.	Wilmington	Chemicals	121.5K lbs
37	V & M Aerospace	Los Angeles	Fabricated Metals	113.9K lbs
38	Phibro-Tech Inc.	Santa Fe Springs	Chemicals	112.5K lbs
39	Equilon Carson Terminal	Carson	Petroleum Bulk Terminals	110.9K lbs
40	Custom Fibreglass Manufacturing Co	Long Beach	Transportation Equipment	103.0K lbs
41	U.S. Navy San Clemente Island	San Clemente Island	Other	103.0K lbs
42	Airgas Dry Ice	Torrance	Chemicals	102.0K lbs
43	Evonik Corp	Los Angeles	Chemicals	96.7K lbs
44	Surface Treatment & Inspection (st&i) Inc.	Paramount	Fabricated Metals	95.9K lbs
45	Alert Plating Co	Sun Valley	Fabricated Metals	94.5K lbs
46	Triumph Processing Inc DBA As Valence Lynwood	Lynwood	Fabricated Metals	92.7K lbs
47	Ineos Polypropylene LLC	Carson	Chemicals	91.5K lbs
48	Fabri Cote	Los Angeles	Textiles	85.3K lbs
49	Americas Styrenics LLC - Torrance	Torrance	Chemicals	84.3K lbs
50	Clean Harbors Wilmington LLC	Wilmington	Hazardous Waste	82.7K lbs

Superfund Sites (19)

Site Name	City	Status	HRS Score
Cooper Drum Company	South Gate	NPL Site	50.00
Del Amo	Los Angeles	NPL Site	47.12
Exide Technologies - Vernon	Vernon	Proposed NPL Site	47.78
Jervis B. Webb Co.	South Gate	NPL Site	45.76
Jet Propulsion Laboratory (NASA)	Pasadena	NPL Site	50.00
Montrose Chemical Corp.	Torrance	NPL Site	32.10
Omega Chemical Corporation	Whittier	NPL Site	30.94
Operating Industries, Inc., Landfill	Monterey Park	NPL Site	57.22
Pemaco Maywood	Maywood	NPL Site	45.23
San Fernando Valley (Area 1)	Los Angeles	NPL Site	42.24
San Fernando Valley (Area 2)	Glendale, Los Angeles	NPL Site	42.24
San Fernando Valley (Area 3)	Glendale	Deleted NPL Site	42.24
San Fernando Valley (Area 4)	Los Angeles	NPL Site	35.57
San Gabriel Valley (Area 1)	El Monte	NPL Site	42.24
San Gabriel Valley (Area 2)	Baldwin Park Area	NPL Site	42.24
San Gabriel Valley (Area 3)	Alhambra	NPL Site	28.90
San Gabriel Valley (Area 4)	La Puente	NPL Site	28.90
Southern Avenue Industrial Area	South Gate	NPL Site	50.00
Waste Disposal, Inc.	Santa Fe Springs	NPL Site	34.60

Cities in Los Angeles (117)

Los Angeles

42 facilities · 22 water

Torrance

28 facilities · 2 water

Santa Fe Springs

26 facilities · 2 water

City Of Industry

23 facilities · 0 water

Long Beach

22 facilities · 2 water

Gardena

18 facilities · 0 water

South Gate

15 facilities · 1 water

Carson

15 facilities · 0 water

Wilmington

14 facilities · 0 water

Vernon

12 facilities · 1 water

Compton

10 facilities · 2 water

Paramount

10 facilities · 1 water

Commerce

10 facilities · 0 water

Sun Valley

10 facilities · 0 water

Valencia

9 facilities · 2 water

Chatsworth

8 facilities · 0 water

Azusa

7 facilities · 2 water

El Segundo

7 facilities · 2 water

Pomona

7 facilities · 2 water

Palmdale

5 facilities · 9 water

Huntington Park

5 facilities · 3 water

North Hollywood

5 facilities · 0 water

Hawthorne

4 facilities · 5 water

Santa Clarita

4 facilities · 2 water

Irwindale

4 facilities · 0 water

Sylmar

4 facilities · 0 water

Van Nuys

4 facilities · 0 water

Downey

3 facilities · 9 water

Whittier

3 facilities · 5 water

Baldwin Park

3 facilities · 2 water

Burbank

3 facilities · 2 water

Monrovia

3 facilities · 1 water

Walnut

3 facilities · 1 water

Rosemead

2 facilities · 15 water

Pasadena

2 facilities · 6 water

Arcadia

2 facilities · 2 water

Cudahy

2 facilities · 2 water

La Puente

2 facilities · 2 water

Montebello

2 facilities · 2 water

Artesia

2 facilities · 1 water

Cerritos

2 facilities · 1 water

Inglewood

2 facilities · 1 water

San Fernando

2 facilities · 1 water

Signal Hill

2 facilities · 1 water

Industry

2 facilities · 0 water

Pacoima

2 facilities · 0 water

San Pedro

2 facilities · 0 water

West Covina

1 facilities · 11 water

El Monte

1 facilities · 8 water

San Dimas

1 facilities · 8 water

Manhattan Beach

1 facilities · 2 water

Pico Rivera

1 facilities · 2 water

Avalon

1 facilities · 1 water

Glendale

1 facilities · 1 water

Littlerock

1 facilities · 1 water

Lynwood

1 facilities · 1 water

Redondo Beach

1 facilities · 1 water

Santa Monica

1 facilities · 1 water

West Hollywood

1 facilities · 1 water

Arleta

1 facilities · 0 water

Bell

1 facilities · 0 water

Bell Gardens

1 facilities · 0 water

Canoga Park

1 facilities · 0 water

Canyon Country

1 facilities · 0 water

City Of Commerce

1 facilities · 0 water

East Rancho Dominguez

1 facilities · 0 water

Northridge

1 facilities · 0 water

Panorama City

1 facilities · 0 water

Rancho Dominguez

1 facilities · 0 water

Rosewood

1 facilities · 0 water

San Clemente Island

1 facilities · 0 water

South El Monte

1 facilities · 0 water

Alhambra

0 facilities · 10 water

La Verne

0 facilities · 8 water

Covina

0 facilities · 7 water

Beverly Hills

0 facilities · 4 water

Claremont

0 facilities · 4 water

Llano

0 facilities · 4 water

Altadena

0 facilities · 3 water

Agoura Hills

0 facilities · 2 water

Agua Dulce

0 facilities · 2 water

Bellflower

0 facilities · 2 water

Calabasas

0 facilities · 2 water

Castaic

0 facilities · 2 water

Hermosa Beach

0 facilities · 2 water

La Canada Flintridge

0 facilities · 2 water

Lake Hughes

0 facilities · 2 water

Maywood

0 facilities · 2 water

Mt. Baldy

0 facilities · 2 water

Quartz Hill

0 facilities · 2 water

South Pasadena

0 facilities · 2 water

Tujunga

0 facilities · 2 water

Bell Canyon

0 facilities · 1 water

Bevery Hills

0 facilities · 1 water

Elizabeth Lake

0 facilities · 1 water

Encino

0 facilities · 1 water

Glendora

0 facilities · 1 water

Green Valley

0 facilities · 1 water

La Crescenta

0 facilities · 1 water

Lakewood

0 facilities · 1 water

Lomita

0 facilities · 1 water

Marina Del Rey

0 facilities · 1 water

Monterey Park

0 facilities · 1 water

Mount Baldy

0 facilities · 1 water

Newhall

0 facilities · 1 water

Norwalk

0 facilities · 1 water

Palos Verdes Estates

0 facilities · 1 water

Rowland Heights

0 facilities · 1 water

Saugus

0 facilities · 1 water

Sherman Oaks

0 facilities · 1 water

Sierra Madre

0 facilities · 1 water

Studio City

0 facilities · 1 water

Valley Village

0 facilities · 1 water

Valyermo

0 facilities · 1 water

West Hollyhood

0 facilities · 1 water

Baldwin Park Area

0 facilities · 0 water

Glendale, Los Angeles

0 facilities · 0 water

Frequently Asked Questions

What is the environmental risk level in Los Angeles, California? ▼

Los Angeles, CA has an environmental risk score of 99/100 (High Risk), based on 50 TRI facilities, 19 Superfund sites, and 243 water systems on record. 71 water systems have health-based violations. Source: EPA TRI, SDWIS, and Superfund NPL.

Are there Superfund sites in Los Angeles? ▼

Yes, Los Angeles, CA has 19 Superfund sites on the EPA National Priorities List (NPL). Superfund sites are contaminated locations that require long-term cleanup under the EPA Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA).

How many toxic release facilities are in Los Angeles? ▼

Los Angeles, CA has 50 TRI-reporting facilities on record with the EPA Toxic Release Inventory, with a combined total of 41.4M lbs in reported toxic releases. TRI facilities self-report annual chemical release data to the EPA.

What is the air quality in Los Angeles? ▼

In 2024, Los Angeles, CA recorded a median AQI of 80 and a peak AQI of 230. 10% of monitored days had "Good" air quality (AQI 0–50). Source: EPA Air Quality System (AQS) Annual AQI by County.

Is the drinking water safe in Los Angeles? ▼

Los Angeles, CA has 243 EPA-regulated water systems. 71 systems have reported health-based violations (MCL exceedances). A past violation does not necessarily mean water is currently unsafe. For current water quality, contact your local water utility. Source: EPA SDWIS.

What environmental agencies cover Los Angeles? ▼

Environmental compliance in Los Angeles, California is overseen by the U.S. Environmental Protection Agency (EPA) at the federal level and the California state environmental agency. Facilities report to the EPA Toxic Release Inventory, water systems are regulated under the Safe Drinking Water Act, and contaminated sites are managed under the Superfund program. Contact your state environmental agency for local concerns.

What does this county environmental profile show?

This county environmental profile rolls up EPA Toxics Release Inventory facility reports, Safe Drinking Water Information System public-water-system filings, and Superfund National Priorities List sites for the county boundary defined by the U.S. Census Bureau. Facility counts reflect facilities with a reporting address inside the county, not where downstream environmental effects may be observed. Population figures are from the most recent Census ACS 5-year estimate. The county detail page is updated whenever the upstream EPA programs publish revised data; see the methodology page for the documented ingest cadence and the editorial choices governing how aggregations are computed.

Related Guides

Understanding EPA Data

How EPA collects and publishes environmental data

Environmental Justice

Who lives near polluters and environmental hazards

How to Check Environmental Quality

Step-by-step guide to checking your local environment

Read our methodology - how this data is sourced, computed, and verified.

Browse all → | Rankings →

Data sourced from U.S. EPA environmental datasets. See our methodology for details. Retrieved and formatted by PlainEnviro