Oregon Water Systems

Compiled by PlainEnviro Editorial, Environmental Data Editorial Team · July 13, 2026

938 community water systems in Oregon, ranked by violation count. Data from EPA Safe Drinking Water Information System (SDWIS).

Water Systems

938

Total Violations

2,578

Health Violations

390 systems

Population Served

3,754,114

Oregon operates 938 community water systems regulated by the EPA Safe Drinking Water Information System (SDWIS) under the Safe Drinking Water Act. Together these utilities serve an estimated 3,754,114 residents, each filing compliance results with the state's primacy agency and, for federally listed contaminants, with the U.S. Environmental Protection Agency.

Across the state, SDWIS records contain 2,578 total violations, of which 390 systems carry at least one active health-based violation, a Maximum Contaminant Level (MCL) exceedance or treatment-technique failure. That represents roughly 42% of Oregon systems.

Violation counts reflect both infrastructure realities and reporting diligence, a state with more small rural systems will accumulate more monitoring-type violations without necessarily delivering worse water. Health-based violations are the stronger safety signal. A past violation does not itself indicate current unsafe water; utilities must notify customers, remediate, and publish an annual Consumer Confidence Report. All numbers below draw directly from the federal SDWIS record.

Which water systems have violations? (189)

#	System Name	City	Source	Violations	Pop. Served	Health
1	MONROE, CITY OF Harrisburg	Harrisburg	Surface Water	101	723	Yes
2	SKYVIEW ACRES WATER COMPANY Sandy	Sandy	Surface Water	94	200	Yes
3	VALE, CITY OF Vale	Vale	Groundwater	82	1,837	Yes
4	SANDY, CITY OF Sandy	Sandy	Surface Water	44	12,991	Yes
5	WARM SPRINGS WATER TREATMENT PLANT Warm Springs	Warm Springs	Surface Water	43	3,800	Yes
6	ADRIAN, CITY OF Adrian	Adrian	Groundwater	42	159	Yes
7	SIMNASHO SCHOOLIE Warm Springs	Warm Springs	Groundwater	32	350	Yes
8	NYSSA, CITY OF Nyssa	Nyssa	Groundwater	27	3,285	Yes
9	RICHLAND, CITY OF Richland	Richland	Surface Water	21	165	Yes
10	CANYONVILLE, CITY OF Canyonville	Canyonville	Surface Water	20	1,662	Yes
11	MIDLAND WATER ASSOCIATION Clatskanie	Clatskanie	Surface Water	19	160	Yes
12	YOUNG LIFE Antelope	Antelope	Surface Water	18	497	Yes
13	PARADISE/ROGUE MEADOWS WS Clackamas	Clackamas	Groundwater	18	165	Yes
14	UMPQUA RANCH COOP Idleyld	Idleyld	Surface Water	17	161	Yes
15	SHADY OAKS ESTATES Portland	Portland	Groundwater	14	648	Yes
16	WATSECO-BARVIEW WATER DISTRICT Garibaldi	Garibaldi	Groundwater	14	450	Yes
17	REEDSPORT, CITY OF Reedsport	Reedsport	Surface Water	13	4,836	Yes
18	COLTON WATER DISTRICT Colton	Colton	Surface Water	13	1,500	Yes
19	DRAIN, CITY OF Drain	Drain	Surface Water	13	1,194	Yes
20	MONTGOMERY PLACE WATER SYSTEM Portland	Portland	Groundwater	13	207	Yes
21	WESTERN HILLS MH ESTATES Rainier	Rainier	Groundwater	12	375	Yes
22	INTERLACHEN WATER PUD Fairview	Fairview	Groundwater	12	360	Yes
23	ENCHANTED MOBILE HOME PARK Portland	Portland	Groundwater	12	150	Yes
24	YOUNGS RIVER LEWIS & CLARK WD Astoria	Astoria	Surface Water	11	2,580	Yes
25	MAPLETON WATER DISTRICT Mapleton	Mapleton	Surface Water	11	600	Yes
26	PAISLEY, CITY OF Paisley	Paisley	Groundwater	11	245	Yes
27	GLADSTONE, CITY OF Gladstone	Gladstone	Surface Water	10	12,121	Yes
28	OCEANSIDE WATER DISTRICT Oceanside	Oceanside	Surface Water	10	500	Yes
29	LAFAYETTE, CITY OF Lafayette	Lafayette	Surface Water	9	4,423	Yes
30	RHODODENDRON WTR ASSOC Rhododendron	Rhododendron	Surface Water	9	980	Yes
31	ALDER CREEK BARLOW WATER DIST Sandy	Sandy	Surface Water	9	300	Yes
32	PORT ORFORD, CITY OF Port Orford	Port Orford	Surface Water	8	1,200	Yes
33	ROW RIVER VALLEY WATER DIST Dorena	Dorena	Surface Water	8	340	Yes
34	HILAND WC - LOMBARD Newberg	Newberg	Groundwater	8	300	Yes
35	HIGHLINE OAKS WATER UTILITY Portland	Portland	Groundwater	8	242	Yes
36	LANGLOIS WATER DISTRICT Langlois	Langlois	Surface Water	8	220	Yes
37	SUMPTER, CITY OF Sumpter	Sumpter	Surface Water	8	208	Yes
38	EVERETT SQUARE WINDCREST ESTATES Portland	Portland	Groundwater	8	204	Yes
39	BURNS PAIUTE Burns	Burns	Groundwater	8	155	Yes
40	BROOKINGS, CITY OF Brookings	Brookings	Groundwater	7	7,120	Yes
41	HILAND WC - PENTICTON/COLLEGE PARK Newberg	Newberg	Groundwater	7	710	Yes
42	LAURELWOOD WATER USERS Gaston	Gaston	Groundwater	7	200	Yes
43	BRIDGE WATER DISTRICT Myrtle Point	Myrtle Point	Surface Water	7	150	Yes
44	DALLAS, CITY OF Dallas	Dallas	Surface Water	6	17,911	Yes
45	ESTACADA, CITY OF Estacada	Estacada	Surface Water	6	5,750	Yes
46	COQUILLE, CITY OF Coquille	Coquille	Surface Water	6	3,953	Yes
47	HILAND WC - RIVERBEND Newberg	Newberg	Surface Water	6	172	Yes
48	RIVERSTONE MOBILE HOME PARK Cottage Grove	Cottage Grove	Groundwater	6	168	Yes
49	SUNSET LAKE RV PARK Redmond	Redmond	Groundwater	5	170	Yes
50	CARLTON, CITY OF Carlton	Carlton	Surface Water	4	2,270	Yes
51	CITY OF RAINIER Rainier	Rainier	Surface Water	4	1,932	Yes
52	RICKREALL WATER ASSOCIATION Rickreall	Rickreall	Groundwater	4	1,650	Yes
53	ATHENA, CITY OF Athena	Athena	Groundwater	4	1,238	Yes
54	GOLD HILL, CITY OF Gold Hill	Gold Hill	Surface Water	4	1,220	Yes
55	JOSEPH, CITY OF Joseph	Joseph	Surface Water	4	1,182	Yes
56	BUELL-RED PRAIRIE WD Sheridan	Sheridan	Surface Water	4	800	Yes
57	LAIDLAW WATER DISTRICT Bend	Bend	Groundwater	4	740	Yes
58	HILAND WC - BOULDER CREEK Newberg	Newberg	Surface Water	4	350	Yes
59	CANBY REGENCY Molalla	Molalla	Groundwater	4	265	Yes
60	HEBO JOINT WATER & SANITARY AUTH Hebo	Hebo	Groundwater	4	250	Yes
61	IDANHA CITY WATER Idanha	Idanha	Surface Water	4	168	Yes
62	OAK LODGE WATER SERVICES Milwaukie	Milwaukie	Surface Water	3	30,000	Yes
63	SCAPPOOSE, CITY OF Scappoose	Scappoose	Surface Water	3	8,710	Yes
64	CROOKED RIVER RANCH WTR CO Terrebonne	Terrebonne	Groundwater	3	4,000	Yes
65	MOUNT ANGEL, CITY OF Mt. Angel	Mt. Angel	Groundwater	3	3,650	Yes
66	MANZANITA WATER DEPARTMENT Manzanita	Manzanita	Groundwater	3	3,200	Yes
67	MCNULTY WATER PUD St. Helens	St. Helens	Groundwater	3	2,500	Yes
68	COLUMBIA CITY MUN WATERWORKS Columbia City	Columbia City	Groundwater	3	1,995	Yes
69	FAIRVIEW WATER DISTRICT Tillamook	Tillamook	Groundwater	3	1,920	Yes
70	NETARTS WATER DISTRICT Netarts	Netarts	Surface Water	3	1,800	Yes
71	NESKOWIN REG WATER DIST Neskowin	Neskowin	Surface Water	3	1,735	Yes
72	CASCADE LOCKS, CITY OF Cascade Locks	Cascade Locks	Groundwater	3	1,398	Yes
73	YONCALLA, CITY OF Yoncalla	Yoncalla	Surface Water	3	1,050	Yes
74	PRAIRIE CITY Prairie City	Prairie City	Surface Water	3	841	Yes
75	NEAHKAHNIE WATER DISTRICT Nehalem	Nehalem	Groundwater	3	600	Yes
76	MARCOLA WATER DISTRICT Springfield	Springfield	Groundwater	3	600	Yes
77	HILAND WC - ILLAHE GOLF CLUB ESTATES Newberg	Newberg	Groundwater	3	561	Yes
78	MOUNT VERNON, CITY OF Mount Vernon	Mount Vernon	Groundwater	3	510	Yes
79	SCOTTS MILLS, CITY OF Scotts Mills	Scotts Mills	Groundwater	3	421	Yes
80	MAUPIN, CITY OF Maupin	Maupin	Groundwater	3	420	Yes
81	HIGH DESERT ESTATES Prineville	Prineville	Groundwater	3	380	Yes
82	IONE, CITY OF Ione	Ione	Groundwater	3	330	Yes
83	ROCK CREEK WATER DISTRICT Grand Ronde	Grand Ronde	Surface Water	3	300	Yes
84	HILAND WC - BEAR CREEK Newberg	Newberg	Surface Water	3	275	Yes
85	BANDON COASTAL DUNES Bandon	Bandon	Groundwater	3	225	Yes
86	FALCON COVE BEACH WD Arch Cape	Arch Cape	Groundwater	3	215	Yes
87	HILAND WC - WESTWOOD Newberg	Newberg	Groundwater	3	200	Yes
88	SHANGRI-LA WATER DISTRICT Springfield	Springfield	Surface Water	3	200	Yes
89	COUNTRY ESTATES MOBILE PARK Grants Pass	Grants Pass	Groundwater	3	175	Yes
90	ELDERBERRY NEHALEM WS Seaside	Seaside	Groundwater	3	160	Yes
91	VIEW POINT TRAILER COURT The Dalles	The Dalles	Groundwater	3	160	Yes
92	BEND, CITY OF Bend	Bend	Surface Water	2	77,704	Yes
93	MONMOUTH, CITY OF Monmouth	Monmouth	Surface Water	2	11,651	Yes
94	SILVERTON, CITY OF Silverton	Silverton	Surface Water	2	10,484	Yes
95	FAIRVIEW, CITY OF Fairview	Fairview	Groundwater	2	9,963	Yes
96	FLORENCE, CITY OF Florence	Florence	Groundwater	2	9,561	Yes
97	JUNCTION CITY WATER UTILITIES Junction City	Junction City	Groundwater	2	7,000	Yes
98	RAINBOW WATER DISTRICT Springfield	Springfield	Surface Water	2	6,300	Yes
99	TALENT, CITY OF Talent	Talent	Surface Water	2	6,293	Yes
100	HECETA WATER PEOPLES UTILITY DISTRICT Florence	Florence	Surface Water	2	4,921	Yes
101	CHENOWITH PUD The Dalles	The Dalles	Groundwater	2	4,500	Yes
102	HARRISBURG, CITY OF Harrisburg	Harrisburg	Groundwater	2	3,684	Yes
103	DUNDEE, CITY OF Dundee	Dundee	Groundwater	2	2,960	Yes
104	LUCKIAMUTE DOMESTIC WATER COOP Monmouth	Monmouth	Surface Water	2	2,738	Yes
105	CAVE JUNCTION, CITY OF Cave Junction	Cave Junction	Surface Water	2	2,160	Yes
106	VERNONIA, CITY OF Vernonia	Vernonia	Surface Water	2	2,100	Yes
107	BANKS WATER DEPARTMENT Banks	Banks	Surface Water	2	2,070	Yes
108	BROWNSVILLE, CITY OF Brownsville	Brownsville	Surface Water	2	1,906	Yes
109	HILLSBORO-CHERRY GROVE Hillsboro	Hillsboro	Surface Water	2	1,628	Yes
110	GLIDE WATER ASSOCIATION Glide	Glide	Surface Water	2	1,523	Yes
111	NESIKA BEACH-OPHIR WD Ophir	Ophir	Groundwater	2	1,500	Yes
112	BAY CITY WATER SYSTEM Bay City	Bay City	Groundwater	2	1,400	Yes
113	LYONS MEHAMA WATER DISTRICT Lyons	Lyons	Surface Water	2	1,300	Yes
114	PACIFIC CITY JOINT WATER - SAN AUTH Pacific City	Pacific City	Surface Water	2	1,000	Yes
115	SCIO, CITY OF Scio	Scio	Groundwater	2	900	Yes
116	GLENDALE, CITY OF Glendale	Glendale	Surface Water	2	864	Yes
117	MULINO WATER DISTRICT Mulino	Mulino	Groundwater	2	700	Yes
118	CANYON CITY WATER DEPARTMENT Canyon City	Canyon City	Surface Water	2	666	Yes
119	BEAVER WATER DISTRICT Cloverdale	Cloverdale	Surface Water	2	600	Yes
120	WHEELER, CITY OF Wheeler	Wheeler	Groundwater	2	400	Yes
121	HILAND WC - ECHO MOUNTAIN Newberg	Newberg	Groundwater	2	362	Yes
122	MANNA HOUSE CHURCH Portland	Portland	Groundwater	2	300	Yes
123	SMGV/WIDGI CREEK Portland	Portland	Groundwater	2	300	Yes
124	HAZEL DELL ORCHARD The Dalles	The Dalles	Groundwater	2	260	Yes
125	LEXINGTON, TOWN OF Lexington	Lexington	Groundwater	2	255	Yes
126	PETES MOUNTAIN WATER CO Molalla	Molalla	Groundwater	2	250	Yes
127	STARLITE MOBILE VILLAGE Eugene	Eugene	Groundwater	2	250	Yes
128	TYGH VALLEY WATER DISTRICT Tygh Valley	Tygh Valley	Groundwater	2	218	Yes
129	MT HOOD RV VILLAGE Sandy	Sandy	Groundwater	2	200	Yes
130	HELIX, CITY OF Helix	Helix	Groundwater	2	190	Yes
131	TIMBER WATER ASSOCIATION Timber	Timber	Surface Water	2	180	Yes
132	OTTER ROCK WATER DISTRICT Newberg	Newberg	Groundwater	2	175	Yes
133	HILAND WC - SHADOW WOOD Newberg	Newberg	Groundwater	2	175	Yes
134	OCEANSIDE WD - CAPE MEARES Oceanside	Oceanside	Surface Water	2	170	Yes
135	JUNO NONPROFIT WATER IMPROVEMENT DISTR Tillamook	Tillamook	Groundwater	2	170	Yes
136	ROYAL ESTATES Salem	Salem	Groundwater	2	160	Yes
137	PORTLAND WATER BUREAU Portland	Portland	Surface Water	1	666,200	Yes
138	SPRINGFIELD UTILITY BOARD Springfield	Springfield	Surface Water	1	62,100	Yes
139	LAKE OSWEGO MUNICIPAL WATER Lake Oswego	Lake Oswego	Surface Water	1	40,000	Yes
140	CLACKAMAS RIVER WATER - CLAIRMONT Clackamas	Clackamas	Surface Water	1	19,928	Yes
141	PENDLETON, CITY OF Pendleton	Pendleton	Surface Water	1	16,996	Yes
142	ST HELENS, CITY OF St Helens	St Helens	Surface Water	1	13,410	Yes
143	WEST SLOPE WATER DISTRICT Portland	Portland	Surface Water	1	11,000	Yes
144	ASTORIA, CITY OF Astoria	Astoria	Surface Water	1	10,181	Yes
145	UMPQUA BASIN WATER ASSOC Roseburg	Roseburg	Surface Water	1	9,499	Yes
146	CITY OF STAYTON Stayton	Stayton	Surface Water	1	8,400	Yes
147	KERNVILLE-GLENEDEN-LINC BCH WD Gleneden Beach	Gleneden Beach	Surface Water	1	5,609	Yes
148	HUBBARD, CITY OF Hubbard	Hubbard	Groundwater	1	3,478	Yes
149	DAYTON, CITY OF Dayton	Dayton	Groundwater	1	2,535	Yes
150	BORING WATER DISTRICT NO 24 Boring	Boring	Groundwater	1	2,500	Yes
151	LA WATER CO-OP Gaston	Gaston	Surface Water	1	2,500	Yes
152	GRAND RONDE COMMUNITY WTR ASSN Grand Ronde	Grand Ronde	Groundwater	1	2,500	Yes
153	LAKEVIEW, CITY OF Lakeview	Lakeview	Groundwater	1	2,476	Yes
154	WARREN WATER ASSOCIATION St Helens	St Helens	Groundwater	1	2,050	Yes
155	GEARHART WATER DEPARTMENT Gearhart	Gearhart	Surface Water	1	1,780	Yes
156	CTUIR PWD MISSION Pendleton	Pendleton	Groundwater	1	1,310	Yes
157	FALLS CITY, CITY OF Falls City	Falls City	Surface Water	1	1,051	Yes
158	YACHATS, CITY OF Yachats	Yachats	Surface Water	1	1,006	Yes
159	SOUTHWOOD PARK WATER DISTRICT Newberg	Newberg	Groundwater	1	900	Yes
160	MALIN MUNICIPAL WATER Malin	Malin	Groundwater	1	815	Yes
161	TIMBERLINE RIM WATER CO INC Molalla	Molalla	Groundwater	1	800	Yes
162	WASHINGTON COUNTY RAILROAD Portland	Portland	Groundwater	1	795	Yes
163	DUFUR, CITY OF Dufur	Dufur	Groundwater	1	610	Yes
164	FALCON HEIGHTS Klamath Falls	Klamath Falls	Groundwater	1	559	Yes
165	COVE, CITY OF Cove	Cove	Groundwater	1	550	Yes
166	KILCHIS WATER DISTRICT Tillamook	Tillamook	Groundwater	1	500	Yes
167	INDIAN MEADOW WATER COMPANY Sisters	Sisters	Groundwater	1	500	Yes
168	MISSOULA KOA & EL MAR TLR VILLAGE Bend	Bend	Groundwater	1	499	Yes
169	KNOLL TERRACE PARK Corvallis	Corvallis	Groundwater	1	452	Yes
170	CIMMARRON CITY WATER SYSTEM Bend	Bend	Groundwater	1	450	Yes
171	SHELLEY ROAD-CREST ACRES WD Coquille	Coquille	Surface Water	1	430	Yes
172	OREGON SHORES BEACH CLUB INC Chiloquin	Chiloquin	Groundwater	1	352	Yes
173	JOHN DAY WATER DISTRICT Astoria	Astoria	Surface Water	1	350	Yes
174	CAROLINA WATER SYSTEM Salem	Salem	Groundwater	1	300	Yes
175	RINK CREEK WATER DISTRICT Coquille	Coquille	Surface Water	1	285	Yes
176	AVION WC - WILD RIVER Bend	Bend	Groundwater	1	276	Yes
177	DEERHORN COMMUNITY WTR ASSN Springfield	Springfield	Groundwater	1	275	Yes
178	EUGENE MOBILE VILLAGE Eugene	Eugene	Groundwater	1	260	Yes
179	UKIAH, CITY OF Ukiah	Ukiah	Groundwater	1	235	Yes
180	DIAMOND HILL RV PARK Eugene	Eugene	Groundwater	1	203	Yes
181	SOUTH COAST WATER COMPANY Newberg	Newberg	Surface Water	1	200	Yes
182	EXCALIBUR VILLAGE Lake Oswego	Lake Oswego	Groundwater	1	180	Yes
183	COUNTRY GARDEN ESTATES MHP Walterville	Walterville	Groundwater	1	175	Yes
184	ARROWOOD COMMUNITY WATER CO Bend	Bend	Groundwater	1	170	Yes
185	BEVERLY BEACH WATER DISTRICT Newberg	Newberg	Surface Water	1	152	Yes
186	CAMELOT MOBILE HOME PARK Albany	Albany	Groundwater	1	150	Yes
187	CROSSROADS MOBILE HOME PARK Klamath Falls	Klamath Falls	Groundwater	1	150	Yes
188	LATIMER ROAD WATER ASSOCIATION Tillamook	Tillamook	Groundwater	1	150	Yes
189	SPORTSMANS PARK WATER ASSN Tygh Valley	Tygh Valley	Groundwater	1	150	Yes

Systems with No Violations (311)

311 water systems in Oregon have zero recorded violations. Showing the 50 largest by population served.

TUALATIN VALLEY WATER DISTRICT (224,600) SALEM PUBLIC WORKS (199,820) EUGENE WATER & ELECTRIC BOARD (176,000) MEDFORD WATER COMMISSION (106,068) HILLSBORO, CITY OF (92,632) BEAVERTON, CITY OF (88,045) GRESHAM, CITY OF (73,932) ROCKWOOD PUD (65,443) TIGARD, CITY OF (62,500) CORVALLIS, CITY OF (61,468) ALBANY, CITY OF (57,997) SUNRISE WATER AUTHORITY (50,003) KLAMATH FALLS WATER DEPT (40,475) KEIZER, CITY OF (38,585) REDMOND WATER DEPARTMENT (37,566) GRANTS PASS, CITY OF (37,138) AVION WC - GREATER AVION (35,332) MCMINNVILLE WATER & LIGHT (34,515) COOS BAY NORTH BEND WTR BRD (34,500) OREGON CITY (33,940) CLACKAMAS RIVER WATER (29,918) WOODBURN, CITY OF (29,455) ROSEBURG, CITY OF (28,800) TUALATIN, CITY OF (28,106) WEST LINN, CITY OF (28,000) FOREST GROVE, CITY OF (26,838) WILSONVILLE, CITY OF (25,915) NEWBERG, CITY OF (25,138) ASHLAND WATER DEPARTMENT (20,946) MILWAUKIE, CITY OF (20,946) LINCOLN CITY, CITY OF (20,830) HERMISTON, CITY OF (20,000) SHERWOOD, CITY OF (19,885) CENTRAL POINT, CITY OF (19,785) LEBANON, CITY OF (18,945) CANBY UTILITY (18,754) TROUTDALE, CITY OF (16,185) CORNELIUS, CITY OF (14,490) ONTARIO, CITY OF (14,465) SUBURBAN EAST SALEM WD (13,900) LA GRANDE, CITY OF (13,460) THE DALLES, CITY OF (13,010) DESCHUTES VALLEY WATER DIST (11,700) PRINEVILLE, CITY OF (11,000) COTTAGE GROVE, CITY OF (10,879) BAKER CITY (10,349) SWEET HOME, CITY OF (10,322) INDEPENDENCE WATER SYSTEM (10,300) MOLALLA, CITY OF (10,298) NEWPORT, CITY OF (10,160) +261 more

All Water Systems in Oregon (938)

Page 10 of 19, ordered by population served.

System	Population Served	Violations
HILAND WC - SHADOW WOOD	175	2
COUNTRY GARDEN ESTATES MHP	175	1
PROSPECT VILLAGE	175	0
LONG CREEK, CITY OF	173	0
HILAND WC - RIVERBEND	172	6
MOUNTAIN AIR WATER ASSOC	170	0
OCEANSIDE WD - CAPE MEARES	170	2
JUNO NONPROFIT WATER IMPROVEMENT DISTR	170	2
SUNSET LAKE RV PARK	170	5
ARROWOOD COMMUNITY WATER CO	170	1
RIVERSTONE MOBILE HOME PARK	168	6
IDANHA CITY WATER	168	4
CLAYTON CREEK MH ESTATES	165	0
PARADISE/ROGUE MEADOWS WS	165	18
RICHLAND, CITY OF	165	21
GREEN OAKS PARK LLC	165	0
FOREST HAVEN SUBDIVISION	165	0
DUPLEX VILLAGE WATER SYSTEM	165	0
LOWER SILETZ WATER SYSTEM	165	0
UMPQUA RANCH COOP	161	17
MCNARY OAKS MOBILE VILLA	160	0
ELDERBERRY NEHALEM WS	160	3
ROYAL ESTATES	160	2
MIDLAND WATER ASSOCIATION	160	19
SUNDOWNER MOBILE HOME PARK	160	0
DRY CANYON	160	0
VIEW POINT TRAILER COURT	160	3
ADRIAN, CITY OF	159	42
BURNS PAIUTE	155	8
DAYVILLE, CITY OF	155	0
MADRONE HILL MOBILE HOME PARK	155	0
PARRETT MOUNTAIN VIEW ESTATES	155	0
CANYON RIDGE	153	0
TERRACE MOBILE PLAZA	152	0
BEVERLY BEACH WATER DISTRICT	152	1
ENCHANTED MOBILE HOME PARK	150	12
FIR VIEW WATER COMPANY	150	0
CAMELOT MOBILE HOME PARK	150	1
BLUE RIVER WATER DISTRICT	150	0
VILLAGE AT SEAVEY LOOP	150	0
STAFFORDSHIRE WATER SYSTEM	150	0
CROSSROADS MOBILE HOME PARK	150	1
SANTIAM VILLAGE	150	0
BRIDGE WATER DISTRICT	150	7
RIETH WATER DISTRICT	150	0
COUNTRY CLUB WATER DISTRICT	150	0
SALEM MOBILE ESTATES/SHADY ACRES	150	0
CIRCLE C IMPROVEMENT DISTRICT	150	0
LATIMER ROAD WATER ASSOCIATION	150	1
SPORTSMANS PARK WATER ASSN	150	1

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Frequently Asked Questions

How many water systems are in Oregon?

Oregon has 938 community water systems tracked by the EPA, serving a combined population of 3,754,114 people.

How many water systems in Oregon have health violations?

390 water systems in Oregon have health-based violations, which include Maximum Contaminant Level (MCL) and Treatment Technique (TT) violations. These represent 42% of all systems in the state.

What is the total number of water violations in Oregon?

Oregon water systems have accumulated 2,578 total violations across all 938 community water systems.

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About This Data

Water system data is from the EPA Safe Drinking Water Information System (SDWIS). Health-based violations include Maximum Contaminant Level (MCL) and Treatment Technique (TT) violations that may pose a direct risk to public health. Only community water systems (CWS) are included.

Source: U.S. Environmental Protection Agency, SDWIS Federal Reporting Services U.S. Environmental Protection Agency, SDWIS Federal Reporting Services

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

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