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RAINIER WATER DEPARTMENT

PWS ID: WA5370980 · RAINIER, Washington 98576

RAINIER WATER DEPARTMENT serves 2,758 people in RAINIER, Washington using Groundwater water sources. It has 90 recorded EPA violations, including 3 health-based violations. No PFAS contamination was detected in UCMR5 testing.

Water Quality Snapshot: RAINIER WATER DEPARTMENT

RAINIER WATER DEPARTMENT is a local-owned community water system that delivers drinking water to 2,758 residents in RAINIER, Washington (Thurston County) through 730 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 90 total violations for this system , of which 3 (3%) are health-based — meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 84 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 Barium, recorded in 4 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. RAINIER WATER DEPARTMENT's 90 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
2,758
Total Violations
90
Health-Based Violations
3
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Local
Connections
730
County
Thurston
School/Daycare
No
MCL Violations
3
Monitoring Violations
84
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Barium MR 4 2002
Cadmium MR 4 2002
Chromium MR 4 2002
Fluoride MR 4 2002
Mercury MR 4 2002
Selenium MR 4 2002
Thallium, Total MR 3 2002
Consumer Confidence Rule Other 3 2025
Antimony, Total MR 3 2002
Nickel MR 3 2002
Coliform (TCR) MCL 3 1999
CYANIDE MR 3 2002
Beryllium, Total MR 3 2002
1,2,4-Trichlorobenzene MR 2 2002
o-Dichlorobenzene MR 2 2002
trans-1,2-Dichloroethylene MR 2 2002
1,2-Dichloroethane MR 2 2002
1,1,2-Trichloroethane MR 2 2002
Toluene MR 2 2002
Ethylbenzene MR 2 2002
Styrene MR 2 2002
cis-1,2-Dichloroethylene MR 2 2002
DICHLOROMETHANE MR 2 2002
Vinyl chloride MR 2 2002
1,1-Dichloroethylene MR 2 2002
Tetrachloroethylene MR 2 2002
CHLOROBENZENE MR 2 2002
Coliform (TCR) MR 2 1992
Carbon tetrachloride MR 2 2002
Trichloroethylene MR 2 2002

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 RAINIER WATER DEPARTMENT.

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 WA5370980 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 RAINIER WATER DEPARTMENT 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 Consumer Confidence Rule Other 3 SDWIS / WA5370980 / 7000
2002 Barium MR 4 SDWIS / WA5370980 / 1010
2002 Cadmium MR 4 SDWIS / WA5370980 / 1015
2002 Chromium MR 4 SDWIS / WA5370980 / 1020
2002 Fluoride MR 4 SDWIS / WA5370980 / 1025
2002 Mercury MR 4 SDWIS / WA5370980 / 1035
2002 Selenium MR 4 SDWIS / WA5370980 / 1045
2002 Thallium, Total MR 3 SDWIS / WA5370980 / 1085
2002 Antimony, Total MR 3 SDWIS / WA5370980 / 1074
2002 Nickel MR 3 SDWIS / WA5370980 / 1036
2002 CYANIDE MR 3 SDWIS / WA5370980 / 1024
2002 Beryllium, Total MR 3 SDWIS / WA5370980 / 1075
2002 1,2,4-Trichlorobenzene MR 2 SDWIS / WA5370980 / 2378
2002 o-Dichlorobenzene MR 2 SDWIS / WA5370980 / 2968
2002 trans-1,2-Dichloroethylene MR 2 SDWIS / WA5370980 / 2979

How RAINIER WATER DEPARTMENT Compares

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

Metric RAINIER WATER DEPARTMENT Washington avg Federal benchmark
Total violations 90 69 SDWA compliance — any non-zero count is a recorded breach
Health-based violations 3 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 2,758 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 RAINIER WATER DEPARTMENT water safe to drink? ▼
RAINIER WATER DEPARTMENT (PWS ID: WA5370980) has 90 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 2,758 people using Groundwater sources.
How many people does RAINIER WATER DEPARTMENT serve? ▼
RAINIER WATER DEPARTMENT serves 2,758 people in RAINIER, Washington. It is a Local-owned system using Groundwater water sources with 730 service connections.
What type of violations does RAINIER WATER DEPARTMENT have? ▼
RAINIER WATER DEPARTMENT has 90 total violations: 3 health-based violations (MCL exceedances or treatment failures), 84 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in RAINIER WATER DEPARTMENT water? ▼
No PFAS testing data is available for RAINIER WATER DEPARTMENT under the EPA's UCMR5 monitoring program.
What water source does RAINIER WATER DEPARTMENT use? ▼
RAINIER WATER DEPARTMENT 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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Data sourced from $official public datasets. See our methodology for details. Retrieved and formatted by Kiznis Studio Editorial