Monterey, CA
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.
Environmental data for Monterey in California · Population: 435,834
TRI sites such as U.S. Army Garrison Fort Hunter Liggett Ranges; Lhoist North America Nativadad Plant; Fujifilm Electronic Materials USA Inc.; SDWIS systems such as CAL AM WATER COMPANY - MONTEREY; ALCO WATER SERVICE; MARINA COAST WATER DISTRICT; NPL sites such as Crazy Horse Sanitary Landfill; Firestone Tire & Rubber Co. (Salinas Plant); Fort Ord anchor Monterey, CA's EPA extract. Derived burden score 50/100 (Moderate Risk) uses fixed national caps on density, log release volume, Superfund count, and health-flagged systems - not an official EPA rating.
Health-flagged SDWIS rows in Monterey include LITTLE BEAR WATER COMPANY; NACIMIENTO WATER COMPANY; CAL AM - WEST SAN MARTIN, while U.S. Army Garrison Fort Hunter Liggett Ranges leads reported TRI pounds among local Form R filers. AQS median AQI 39 / peak 71 in 2024.
Burden score 50/100 (Moderate Risk) is the only weighted composite on this page. The tables below list every TRI facility, SDWIS system, and Superfund site EPA has on record for Monterey -- not just the names called out above -- reproducing the disclosure history as filed, not a current-safety verdict. Extract current as of 2026-08-25.
Release-over-release change
What changed for Monterey, CA: EPA TRI 2023 reporting year
Same facilities, both years
-28.2%
5 facilities that filed in 2022 and 2023
Whole inventory
-28.2%
39.8 thousand lb → 28.6 thousand lb, every facility that filed
Between the two reporting years, 1 facility filed for the first time and 0 stopped filing. Facilities entering or leaving the inventory are excluded from the same-facility comparison above.
- Monterey, CA's total reported releases fell from 39.8 thousand lb in 2022 to 28.6 thousand lb in 2023, based on EPA TRI filings.
- Monterey, CA's land releases fell from 39.7 thousand lb in 2022 to 28.5 thousand lb in 2023, based on EPA TRI filings.
- Monterey, CA's air releases fell from 89 lb in 2022 to 65 lb in 2023, based on EPA TRI filings.
- Monterey, CA's chemicals reported fell from 8 in 2022 to 7 in 2023, based on EPA TRI filings.
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) | Max AQI |
|---|---|---|---|---|
| 2024 | 292 (80%) | 74 | 0 | 71 |
| 2023 | 274 (75%) | 90 | 1 | 115 |
| 2022 | 299 (82%) | 66 | 0 | 80 |
| 2021 | 261 (72%) | 104 | 0 | 80 |
| 2020 | 259 (71%) | 92 | 4 | 275 |
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 (128)
| System | System pop (SDWIS) | Violations |
|---|---|---|
| CAL AM WATER COMPANY - MONTEREY | 92,450 | 0 |
| ALCO WATER SERVICE | 56,253 | 0 |
| MARINA COAST WATER DISTRICT | 38,377 | 0 |
| SOLEDAD, CITY OF | 19,455 | 0 |
| GREENFIELD, CITY OF | 18,967 | 0 |
| GONZALES, CITY OF | 8,327 | 0 |
| CASTROVILLE COMMUNITY SERVICES DISTRICT | 7,515 | 0 |
| CORRECTIONAL TRAINING FACILITY - SOLEDAD | 4,269 | 0 |
| AROMAS WATER DISTRICT | 2,988 | 0 |
| SALINAS VALLEY STATE PRISON | 2,930 | 0 |
| SEASIDE MUNICIPAL WATER SYSTEM | 2,800 | 0 |
| FORT HUNTER LIGGETT | 2,753 | 0 |
| SAN MIGUEL COMMUNITY SERVICES DISTRICT | 2,600 | 0 |
| LITTLE BEAR WATER COMPANY | 2,327 | 1 |
| NACIMIENTO WATER COMPANY | 2,181 | 66 |
| CAL AM - WEST SAN MARTIN | 1,173 | 1 |
| CAL AM WATER COMPANY - CHUALAR | 1,139 | 0 |
| CAL AM WATER COMPANY - HIDDEN HILLS | 1,106 | 0 |
| CAL AM WATER COMPANY - TORO | 1,065 | 0 |
| CAL AM WATER COMPANY - AMBLER PARK | 980 | 0 |
| SANTA LUCIA PRESERVE WS | 966 | 0 |
| NEPENTHE WS | 618 | 0 |
| CSP-PFEIFFER BIG SUR | 585 | 0 |
| SAN ARDO WD | 575 | 1 |
| GABILAN WC | 535 | 0 |
| POST RANCH INN WS | 416 | 0 |
| CANADA WOODS WC | 356 | 0 |
| SUNSET WEST COMMUNITY LLC | 350 | 0 |
| TWIN VALLEY INC | 317 | 57 |
| SAN LUCAS COUNTY WATER DISTRICT | 315 | 6 |
| PRUNEDALE MWC | 277 | 12 |
| PEDRAZZI MWC | 273 | 0 |
| SAN JERARDO COOP WS | 249 | 0 |
| ESALEN INSTITUTE WS | 246 | 0 |
| MONTEREY DUNES MWA | 243 | 0 |
| COUNTRYSIDE ESTATES MWC | 243 | 1 |
| PARADISE LAKE MUTUAL WATER CO. | 213 | 0 |
| MORO RD WS #09 | 210 | 79 |
| PARADISE RD WS #09 | 206 | 1 |
| COLONIAL OAK WC INC | 198 | 6 |
| VENTANA BIG SUR INN WS | 193 | 0 |
| ROLLING HILLS RANCHO WA | 185 | 0 |
| FERNWOOD WS | 184 | 0 |
| FOOTHILL ESTATES WS | 183 | 0 |
| LAGUNA SECA WC | 162 | 56 |
| MERRILL GARDENS IRIS CANYON WS | 161 | 0 |
| TASSAJARA SPRINGS WS | 150 | 0 |
| CALIFORNIA ORCHARD WS | 150 | 0 |
| EL CAMINO WC INC | 133 | 60 |
| ARROYO CENTER WC | 130 | 13 |
| COASTLANDS MWS (POST CREEK) | 129 | 1 |
| ASSISI MWC | 126 | 1 |
| PRINCES CAMP RESORT WS | 126 | 0 |
| CLEAR RIDGE WA | 123 | 15 |
| DOLAN RD MWC | 120 | 0 |
| PESANTE RD WS #02 | 120 | 0 |
| BLUFFS WS | 120 | 0 |
| HIDDEN CANYON RANCH MWC | 116 | 0 |
| VALLEY OAKS MHP WS | 108 | 0 |
| OAK HEIGHTS W & R CO INC | 105 | 23 |
| ASOLEADO MWC | 101 | 0 |
| RANCHO BORROMEO MWC | 100 | 0 |
| CAL AM WATER COMPANY - RALPH LANE | 96 | 0 |
| LOMAS DEL SOL MWS | 93 | 0 |
| SAN MIGUEL WS #22 | 93 | 1 |
| OAK MANOR WS | 92 | 1 |
| VISTA DEL TORO WS | 92 | 55 |
| MCCOY RD WS #05 | 92 | 44 |
| ROBLEY PROPERTY MWS | 92 | 0 |
| ENCINAL RD WS #01 | 91 | 84 |
| MESA DEL TORO MWC | 90 | 0 |
| TULARCITOS MWC | 90 | 0 |
| HIDDEN VALLEY WA | 87 | 3 |
| IVERSON & JACKS APTS WS | 86 | 0 |
| FALLON ROAD LABOR HOUSING | 84 | 0 |
| BLACKIE RD WS #05 | 78 | 2 |
| APPLE AVE WS #02 | 75 | 1 |
| HARBOR VIEW WA | 75 | 1 |
| GLENN AVE WS #01 | 73 | 1 |
| WOODSIDE WA | 73 | 0 |
| LOS CARNEROS MWA | 70 | 2 |
| ARROYO SECO ESTATES MWS | 70 | 1 |
| SAN VICENTE MWC | 69 | 10 |
| MORO COJO MWA | 67 | 1 |
| MURPHY HILL WS #02 | 66 | 1 |
| VIERRA KNOLLS MWC | 66 | 1 |
| HIDDEN VIEWS MHP WS | 65 | 0 |
| MURPHY HILL WS #01 | 65 | 1 |
| GARLEN COURT WS | 65 | 6 |
| RIVER RD WS #25 | 65 | 46 |
| VIERRA MEADOWS MWC | 65 | 2 |
| LEAFWOOD COMMUNITY WA | 64 | 1 |
| PIONEER PLACE MWS | 64 | 0 |
| Z RANCH MWC | 62 | 0 |
| NORTH SHORE ESTATES WS | 60 | 0 |
| THIMIO MWC | 59 | 20 |
| RANCHO CHAPARRAL MWC | 58 | 13 |
| TIERRA MEADOWS HOA WS | 58 | 0 |
| WOODLAND HEIGHTS MWC | 57 | 0 |
| THE WILLOWS RESORT | 57 | 5 |
| JOST POST WA | 56 | 0 |
| DESMOND RD WS #03 | 56 | 0 |
| GREEN ACRES WA | 56 | 0 |
| DEL MONTE FARMS RD WS #03 | 55 | 0 |
| CACHAGUA MUTUAL WS (#4) | 55 | 0 |
| CORDA RD WS | 54 | 8 |
| TIERRA VISTA MWC | 54 | 19 |
| PESANTE RD WS #06 | 50 | 1 |
| SAN JUAN RD WS #01 | 49 | 0 |
| TIERRA VERDE MWC | 48 | 0 |
| PARADISE RD WS #21 | 48 | 1 |
| FOOTHILL WA | 46 | 1 |
| ECHO VALLEY RD WS #05 | 45 | 0 |
| MOUNT TORO RANCHOS MWA | 45 | 0 |
| NEW CAMALDOLI HERMITAGE WS | 44 | 0 |
| PARADISE RD WS #05 | 42 | 0 |
| BRANDON CREEK MWS | 41 | 2 |
| CALERA CANYON HEIGHTS HOA | 40 | 0 |
| BERRY DR WS #02 | 40 | 0 |
| ROYAL SIERRA ESTATES WS | 36 | 16 |
| PINE ST WS #01 | 36 | 0 |
| OUTLOOK WA | 35 | 0 |
| PARTINGTON MWC | 35 | 14 |
| WILLIAMS - RC FARMS WS | 35 | 1 |
| AROMAS HILLS MUTUAL WATER ASSOCIATION | 33 | 4 |
| ORCHARD LN WS #02 | 32 | 0 |
| CAL AM WATER COMPANY - GARRAPATA | 30 | 0 |
| BRADLEY-LOCKWOOD RD WS | 25 | 0 |
TRI Facilities (7)
| # | Facility | Total Releases |
|---|---|---|
| 1 | U.S. Army Garrison Fort Hunter Liggett Ranges | 133.5K lbs |
| 2 | Lhoist North America Nativadad Plant | 19.4K lbs |
| 3 | Fujifilm Electronic Materials USA Inc. | 302 lbs |
| 4 | Granite Rock Co Monterey Branch BR341 | 0 lbs |
| 5 | Granite Rock Co Salinas Concrete | 0 lbs |
| 6 | Growers Ice Co | 0 lbs |
| 7 | Dole Fresh Vegetables Inc | 0 lbs |
Superfund Sites (3)
| Site Name | Status | HRS Score |
|---|---|---|
| Crazy Horse Sanitary Landfill | NPL Site | 37.93 |
| Firestone Tire & Rubber Co. (Salinas Plant) | Deleted NPL Site | 45.91 |
| Fort Ord | NPL Site | 42.24 |
Cities in Monterey (23)
Frequently Asked Questions
What is the environmental risk level in Monterey, California? ▼
Are there Superfund sites in Monterey? ▼
How many toxic release facilities are in Monterey? ▼
What is the air quality in Monterey? ▼
Is the drinking water safe in Monterey? ▼
What environmental agencies cover Monterey? ▼
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.
Read our methodology - how this data is sourced, computed, and verified.