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OROVILLE CITY OF

PWS ID: WA5364400 · Oroville, Washington 98844-2200

OROVILLE CITY OF serves 3,256 people in Oroville, Washington using Groundwater water sources. It has 92 recorded EPA violations, including 19 health-based violations. No PFAS contamination was detected in UCMR5 testing.

Water Quality Snapshot: OROVILLE CITY OF

OROVILLE CITY OF is a local-owned community water system that delivers drinking water to 3,256 residents in Oroville, Washington (Okanogan County) through 1,732 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 92 total violations for this system , of which 19 (21%) are health-based — meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 72 monitoring and reporting violations are on file. The most recent violation on record dates to 2014.

The most frequently cited contaminant at this system is Coliform (TCR), recorded in 19 violations (MCL, health-based). This system has not yet been sampled under EPA's UCMR5 PFAS monitoring program, so no PFAS detection data is available here.

Across Washington, EPA tracks 4,557 public water systems serving 9,736,844 people, with 314,648 cumulative violations and 20,590 health-based violations on record. About 92% of systems in the state carry at least one violation, and state-wide the average per system is 69 violations. OROVILLE CITY OF's 92 violations sit above the Washington average. Statewide, 98 of 247 UCMR5-tested systems have reported PFAS detections (39.7%). All figures above are sourced directly from EPA SDWIS and UCMR5 public data releases and are updated as EPA publishes new reporting cycles.

Population Served
3,256
Total Violations
92
Health-Based Violations
19
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Local
Connections
1,732
County
Okanogan
School/Daycare
No
MCL Violations
19
Monitoring Violations
72
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Coliform (TCR) MCL 19 2004
Endrin MR 2 2014
Toxaphene MR 2 2014
Simazine MR 2 2014
Di(2-ethylhexyl) phthalate MR 2 2014
Atrazine MR 2 2014
Heptachlor epoxide MR 2 2014
HEXACHLOROBENZENE MR 2 2014
Benzo(a)pyrene MR 2 2014
Methoxychlor MR 2 2014
Hexachlorocyclopentadiene MR 2 2014
Chlordane MR 2 2014
Coliform (TCR) MR 2 1992
LASSO MR 2 2014
Heptachlor MR 2 2014
Di(2-ethylhexyl) adipate MR 2 2014
BHC-GAMMA MR 2 2014
Nitrate MR 1 2003
Arsenic MR 1 2008
Barium MR 1 2008
Cadmium MR 1 2008
Fluoride MR 1 2008
Mercury MR 1 2008
Beryllium, Total MR 1 2008
Thallium, Total MR 1 2008
1,2,4-Trichlorobenzene MR 1 2008
p-Dichlorobenzene MR 1 2008
Vinyl chloride MR 1 2008
1,1-Dichloroethylene MR 1 2008
1,2-Dichloroethane MR 1 2008

Verify This Water System

The figures above are aggregated from EPA's public databases. To verify the underlying records — or to file a complaint, request a Consumer Confidence Report, or check current monitoring status — go directly to the federal and state regulators that enforce the Safe Drinking Water Act for OROVILLE CITY OF.

Federal Source of Truth

EPA SDWIS — Federal Reports

EPA's Safe Drinking Water Information System (SDWIS) holds the federal compliance record for every regulated public water system. Open the system-level report by PWS ID:

View PWS ID WA5364400 on SDWIS

Source: EPA SDWIS Federal Reports Search

State Regulator

Washington Drinking Water Authority

Washington State Department of Health — Office of Drinking Water is the primacy agency that licenses and inspects OROVILLE CITY OF under EPA-delegated authority.

Open WA regulator portal

Source: Washington State Department of Health — Office of Drinking Water

Violation Timeline

Each row links to the EPA SDWIS public record for verification. Cross-reference the contaminant code on EPA's federal report to see violation dates, return-to-compliance status, and enforcement actions.

Year (latest) Contaminant Category Count EPA Record
2014 Endrin MR 2 SDWIS / WA5364400 / 2005
2014 Toxaphene MR 2 SDWIS / WA5364400 / 2020
2014 Simazine MR 2 SDWIS / WA5364400 / 2037
2014 Di(2-ethylhexyl) phthalate MR 2 SDWIS / WA5364400 / 2039
2014 Atrazine MR 2 SDWIS / WA5364400 / 2050
2014 Heptachlor epoxide MR 2 SDWIS / WA5364400 / 2067
2014 HEXACHLOROBENZENE MR 2 SDWIS / WA5364400 / 2274
2014 Benzo(a)pyrene MR 2 SDWIS / WA5364400 / 2306
2014 Methoxychlor MR 2 SDWIS / WA5364400 / 2015
2014 Hexachlorocyclopentadiene MR 2 SDWIS / WA5364400 / 2042
2014 Chlordane MR 2 SDWIS / WA5364400 / 2959
2014 LASSO MR 2 SDWIS / WA5364400 / 2051
2014 Heptachlor MR 2 SDWIS / WA5364400 / 2065
2014 Di(2-ethylhexyl) adipate MR 2 SDWIS / WA5364400 / 2035
2014 BHC-GAMMA MR 2 SDWIS / WA5364400 / 2010

How OROVILLE CITY OF Compares

Cross-reference this system's record against state averages and the federal MCL framework for context.

Metric OROVILLE CITY OF Washington avg Federal benchmark
Total violations 92 69 SDWA compliance — any non-zero count is a recorded breach
Health-based violations 19 4.5 Indicates a contaminant exceeded a federal MCL
PFAS detection None 39.7% EPA final rule (2024): PFOA/PFOS MCL = 4.0 ppt
Population served 3,256 2,137 Sizing context for compliance burden

Sources: EPA SDWIS and EPA National Primary Drinking Water Regulations (40 CFR Part 141). State averages computed across 4,557 regulated public water systems in Washington.

Federal MCL reference — Safe Drinking Water Act thresholds ▼
Contaminant Federal MCL / Action Level Note
Lead 0 mg/L (Action Level: 0.015 mg/L) Lead and Copper Rule treatment technique
Arsenic 0.010 mg/L (10 ppb) Health-based MCL since 2006
Total Coliform Treatment technique (RTCR) Indicator organism, monitoring trigger
PFOA / PFOS (PFAS) 4.0 ppt each (final 2024 rule) Compliance deadline 2029
Nitrate (as N) 10 mg/L Acute health risk for infants

Frequently Asked Questions

Is OROVILLE CITY OF water safe to drink? ▼
OROVILLE CITY OF (PWS ID: WA5364400) has 92 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 3,256 people using Groundwater sources.
How many people does OROVILLE CITY OF serve? ▼
OROVILLE CITY OF serves 3,256 people in Oroville, Washington. It is a Local-owned system using Groundwater water sources with 1,732 service connections.
What type of violations does OROVILLE CITY OF have? ▼
OROVILLE CITY OF has 92 total violations: 19 health-based violations (MCL exceedances or treatment failures), 72 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in OROVILLE CITY OF water? ▼
No PFAS testing data is available for OROVILLE CITY OF under the EPA's UCMR5 monitoring program.
What water source does OROVILLE CITY OF use? ▼
OROVILLE CITY OF uses Groundwater as its primary water source. It is classified as a Community Water System (CWS), serving residential populations year-round.
Where does this data come from? ▼
All data comes from the EPA Safe Drinking Water Information System (SDWIS) and the UCMR5 PFAS monitoring program. SDWIS tracks compliance for all public water systems regulated under the Safe Drinking Water Act.

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Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025. This data is provided for informational purposes only.

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

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