Oregon Drinking Water Compliance Records
938 water systems serving 3,747,651 people. 69,294 historical EPA violation records in the Q2 2026 snapshot.
TapScore Compliance-History Grades
A
153
16%
B
193
21%
C
419
45%
D
155
17%
F
18
2%
938
Water Systems
3,747,651
Population Served
69,294
Historical Records
4,400
Health-Based (All Years)
Systems With the Most Recent EPA Records
GALICE SUBDIVISION WATER CO
33 served1,237 historical records1,088 recent
F
SUMNER WATER CORPORATION
50 served656 historical records505 recent
D
TROLLERS COVE WATER ASSN
32 served691 historical records210 recent
D
ELK RIVER CAMPGROUND
64 served235 historical records200 recent
D
KLAMATH FALLS WATER DEPT
40,475 served351 historical records199 recent
C
CASCADE GORGE PROPERTIES
33 served370 historical records177 recent
F
TIMBER WATER ASSOCIATION
180 served420 historical records173 recent
C
LONDON WATER CO-OP
63 served466 historical records134 recent
F
MIDLAND WATER ASSOCIATION
160 served299 historical records119 recent
F
WATSONVILLE WATER SYSTEM
27 served162 historical records117 recent
D
Large Systems With No Recent Records
TUALATIN VALLEY WATER DISTRICT
224,600 served2 historical records
A
EUGENE WATER & ELECTRIC BOARD
176,000 served11 historical records
A
ROCKWOOD PUD
65,443 served61 historical records
A
SPRINGFIELD UTILITY BOARD
62,100 served7 historical records
A
CORVALLIS, CITY OF
61,468 served31 historical records
A
ALBANY, CITY OF
57,997 served57 historical records
A
SUNRISE WATER AUTHORITY
50,003 served4 historical records
A
REDMOND WATER DEPARTMENT
37,566 served20 historical records
A
AVION WC - GREATER AVION
35,332 served121 historical records
A
OREGON CITY
33,940 served0 historical records
A
Largest Water Systems in Oregon
| Water System | Grade | Population | Historical Records |
|---|---|---|---|
| PORTLAND WATER BUREAU | B | 666,200 | 16 |
| TUALATIN VALLEY WATER DISTRICT | A | 224,600 | 2 |
| SALEM PUBLIC WORKS | B | 199,820 | 14 |
| EUGENE WATER & ELECTRIC BOARD | A | 176,000 | 11 |
| MEDFORD WATER COMMISSION | C | 106,068 | 12 |
| HILLSBORO, CITY OF | B | 92,632 | 3 |
| BEAVERTON, CITY OF | B | 88,045 | 15 |
| BEND, CITY OF | C | 77,704 | 228 |
| GRESHAM, CITY OF | B | 73,932 | 15 |
| ROCKWOOD PUD | A | 65,443 | 61 |
| TIGARD, CITY OF | C | 62,500 | 17 |
| SPRINGFIELD UTILITY BOARD | A | 62,100 | 7 |
| CORVALLIS, CITY OF | A | 61,468 | 31 |
| ALBANY, CITY OF | A | 57,997 | 57 |
| SUNRISE WATER AUTHORITY | A | 50,003 | 4 |
| KLAMATH FALLS WATER DEPT | C | 40,475 | 351 |
| LAKE OSWEGO MUNICIPAL WATER | B | 40,000 | 31 |
| KEIZER, CITY OF | B | 38,585 | 26 |
| REDMOND WATER DEPARTMENT | A | 37,566 | 20 |
| GRANTS PASS, CITY OF | C | 37,138 | 63 |
Contaminants in Oregon
Lead in OregonArsenic in OregonNitrate in OregonFluoride in OregonPFOS in OregonPFOA in OregonTHMs in OregonHAA5 in Oregon
Cities in Oregon
PORTLAND(17)BEAVERTON(5)SALEM(25)EUGENE(32)BEND(42)MEDFORD(13)HILLSBORO(7)GRESHAM(3)SPRINGFIELD(6)CORVALLIS(12)TIGARD(2)ALBANY(12)MILWAUKIE(3)CLACKAMAS(6)HAPPY VALLEY(5)LAKE OSWEGO(8)ROSEBURG(7)KLAMATH FALLS(15)REDMOND(15)GRANTS PASS(34)KEIZER(4)COOS BAY(5)NEWBERG(46)MCMINNVILLE(2)OREGON CITY(3)WOODBURN(5)WEST LINN(5)TUALATIN(2)FOREST GROVE(1)WILSONVILLE(2)ASHLAND(7)HERMISTON(8)LINCOLN CITY(2)CENTRAL POINT(8)SHERWOOD(2)LEBANON(4)CANBY(6)THE DALLES(7)ASTORIA(9)DALLAS(1)PENDLETON(8)TROUTDALE(1)ST HELENS(5)MADRAS(2)SANDY(13)HOOD RIVER(3)CORNELIUS(3)FLORENCE(2)ONTARIO(1)MONMOUTH(2)LA GRANDE(3)PRINEVILLE(15)GLADSTONE(1)MOLALLA(8)TILLAMOOK(15)COTTAGE GROVE(8)FAIRVIEW(3)NEWPORT(4)SILVERTON(2)BAKER CITY(2)INDEPENDENCE(2)SWEET HOME(1)EAGLE POINT(3)SCAPPOOSE(13)WARRENTON(1)STAYTON(1)WINSTON(2)UMATILLA(2)SUTHERLIN(2)SEASIDE(3)SHERIDAN(3)BROOKINGS(4)JUNCTION CITY(3)MILTON-FREEWATER(2)MYRTLE CREEK(3)TALENT(2)ESTACADA(5)SISTERS(7)SEAL ROCK(1)ODELL(1)PHOENIX(1)BOARDMAN(1)VENETA(2)TERREBONNE(5)GLENEDEN BEACH(1)CRESWELL(1)WALDPORT(6)REEDSPORT(1)PHILOMATH(2)COQUILLE(4)LAFAYETTE(3)HARRISBURG(3)AMITY(2)WOOD VILLAGE(1)SUNRIVER(1)AUMSVILLE(1)BORING(7)LA PINE(2)NORTH PLAINS(1)MT. ANGEL(1)