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RIVERSIDE TOWN OF

PWS ID: WA5372850 · Riverside, Washington 98849

RIVERSIDE TOWN OF serves 429 people in Riverside, Washington using Groundwater water sources. It has 111 recorded EPA violations, including 2 health-based violations. No PFAS contamination was detected in UCMR5 testing.

Water Quality Snapshot: RIVERSIDE TOWN OF

RIVERSIDE TOWN OF is a local-owned community water system that delivers drinking water to 429 residents in Riverside, Washington (Okanogan County) through 135 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 111 total violations for this system , of which 2 (2%) are health-based — meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 102 monitoring and reporting violations are on file. The most recent violation on record dates to 2025.

The most frequently cited contaminant at this system is Arsenic, recorded in 17 violations (MR). 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. RIVERSIDE TOWN OF's 111 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
429
Total Violations
111
Health-Based Violations
2
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Local
Connections
135
County
Okanogan
School/Daycare
No
MCL Violations
2
Monitoring Violations
102
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Arsenic MR 17 2022
Revised Total Coliform Rule MON 16 2025
Consumer Confidence Rule Other 5 2013
Coliform (TCR) MR 3 2015
Lead and Copper Rule MR 3 2022
Nitrate MR 2 2023
1,2-Dichloropropane MR 2 2002
Benzene MR 2 2002
Tetrachloroethylene MR 2 2002
1,2-Dichloroethane MR 2 2002
Vinyl chloride MR 2 2002
1,1-Dichloroethylene MR 2 2002
1,2,4-Trichlorobenzene MR 2 2002
trans-1,2-Dichloroethylene MR 2 2002
cis-1,2-Dichloroethylene MR 2 2002
o-Dichlorobenzene MR 2 2002
1,1,2-Trichloroethane MR 2 2002
p-Dichlorobenzene MR 2 2002
CHLOROBENZENE MR 2 2002
Styrene MR 2 2002
1,1,1-Trichloroethane MR 2 2002
Ethylbenzene MR 2 2002
Coliform (TCR) MCL 2 2005
Toluene MR 2 2002
DICHLOROMETHANE MR 2 2002
Carbon tetrachloride MR 2 2002
Trichloroethylene MR 2 2002
Dalapon MR 1 2020
Heptachlor MR 1 2020
Toxaphene MR 1 2020

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 RIVERSIDE TOWN 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 WA5372850 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 RIVERSIDE TOWN 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
2025 Revised Total Coliform Rule MON 16 SDWIS / WA5372850 / 8000
2023 Nitrate MR 2 SDWIS / WA5372850 / 1040
2022 Arsenic MR 17 SDWIS / WA5372850 / 1005
2022 Lead and Copper Rule MR 3 SDWIS / WA5372850 / 5000
2020 Dalapon MR 1 SDWIS / WA5372850 / 2031
2020 Heptachlor MR 1 SDWIS / WA5372850 / 2065
2020 Toxaphene MR 1 SDWIS / WA5372850 / 2020
2020 Dinoseb MR 1 SDWIS / WA5372850 / 2041
2020 2,4,5-TP MR 1 SDWIS / WA5372850 / 2110
2020 BHC-GAMMA MR 1 SDWIS / WA5372850 / 2010
2020 Di(2-ethylhexyl) phthalate MR 1 SDWIS / WA5372850 / 2039
2020 Endrin MR 1 SDWIS / WA5372850 / 2005
2020 Picloram MR 1 SDWIS / WA5372850 / 2040
2020 Simazine MR 1 SDWIS / WA5372850 / 2037
2020 LASSO MR 1 SDWIS / WA5372850 / 2051

How RIVERSIDE TOWN OF Compares

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

Metric RIVERSIDE TOWN OF Washington avg Federal benchmark
Total violations 111 69 SDWA compliance — any non-zero count is a recorded breach
Health-based violations 2 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 429 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 RIVERSIDE TOWN OF water safe to drink? ▼
RIVERSIDE TOWN OF (PWS ID: WA5372850) has 111 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 429 people using Groundwater sources.
How many people does RIVERSIDE TOWN OF serve? ▼
RIVERSIDE TOWN OF serves 429 people in Riverside, Washington. It is a Local-owned system using Groundwater water sources with 135 service connections.
What type of violations does RIVERSIDE TOWN OF have? ▼
RIVERSIDE TOWN OF has 111 total violations: 2 health-based violations (MCL exceedances or treatment failures), 102 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in RIVERSIDE TOWN OF water? ▼
No PFAS testing data is available for RIVERSIDE TOWN OF under the EPA's UCMR5 monitoring program.
What water source does RIVERSIDE TOWN OF use? ▼
RIVERSIDE TOWN 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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