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Community Water System · PWS WA5324700

Farmington Water Dept

Farmington, Washington 99128 - drinking water served from groundwater sources to 165 people, tracked in EPA SDWIS and UCMR5.

165
People served
28
EPA violations
10
Health-based
Untested
UCMR5 result

The verdict

EPA records 28 drinking-water violations at Farmington Water Dept, 36% of them health-based - below the Washington per-system average.

28
Total EPA violations on record
36%
Health-based (MCL / treatment failure)
165
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Farmington Water Dept

Farmington Water Dept is a local-owned community water system that delivers drinking water to 165 residents in Farmington, Washington (Whitman County) through 84 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 28 total violations for this system , of which 10 (36%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 14 monitoring and reporting violations are on file. The most recent violation on record dates to 2022.

The most frequently cited contaminant at this system is Coliform (TCR), recorded in 10 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. Statewide, 98 of 247 UCMR5-tested systems have reported PFAS detections (39.7%).

Farmington Water Dept's 28 violations sit below the Washington average.

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
165
Total Violations
28
Health-Based Violations
10
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Local
Connections
84
County
Whitman
School/Daycare
No
MCL Violations
10
Monitoring Violations
14
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Coliform (TCR) MCL 10 2004
Coliform (TCR) MR 4 2000
Consumer Confidence Rule Other 3 2017
Nitrate MR 2 2021
Dalapon MR 1 2014
Dinoseb MR 1 2014
Pentachlorophenol MR 1 2014
Gross Alpha, Excl. Radon and U MR 1 1979
Picloram MR 1 2014
2,4,5-TP MR 1 2014
Revised Total Coliform Rule MON 1 2022
Lead and Copper Rule MR 1 2000

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 Farmington Water Dept.

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 WA5324700 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 Farmington Water Dept 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
2022 Revised Total Coliform Rule MON 1 SDWIS / WA5324700 / 8000
2021 Nitrate MR 2 SDWIS / WA5324700 / 1040
2017 Consumer Confidence Rule Other 3 SDWIS / WA5324700 / 7000
2014 Dalapon MR 1 SDWIS / WA5324700 / 2031
2014 Dinoseb MR 1 SDWIS / WA5324700 / 2041
2014 Pentachlorophenol MR 1 SDWIS / WA5324700 / 2326
2014 Picloram MR 1 SDWIS / WA5324700 / 2040
2014 2,4,5-TP MR 1 SDWIS / WA5324700 / 2110
2004 Coliform (TCR) MCL 10 SDWIS / WA5324700 / 3100
2000 Coliform (TCR) MR 4 SDWIS / WA5324700 / 3100
2000 Lead and Copper Rule MR 1 SDWIS / WA5324700 / 5000
1979 Gross Alpha, Excl. Radon and U MR 1 SDWIS / WA5324700 / 4000

How Farmington Water Dept Compares

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

Metric Farmington Water Dept Washington avg Federal benchmark
Total violations 28 69 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 10 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 165 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 (EPA proposed extending to 2031, not yet final as of May 2026)
Nitrate (as N) 10 mg/L Acute health risk for infants

Frequently Asked Questions

Is Farmington Water Dept water safe to drink? ▼
Farmington Water Dept (PWS ID: WA5324700) has 28 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 165 people using Groundwater sources.
How many people does Farmington Water Dept serve? ▼
Farmington Water Dept serves 165 people in Farmington, Washington. It is a Local-owned system using Groundwater water sources with 84 service connections.
What type of violations does Farmington Water Dept have? ▼
Farmington Water Dept has 28 total violations: 10 health-based violations (MCL exceedances or treatment failures), 14 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Farmington Water Dept water? ▼
No PFAS testing data is available for Farmington Water Dept under the EPA's UCMR5 monitoring program.
What water source does Farmington Water Dept use? ▼
Farmington Water Dept 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.
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.

Data sourced from EPA SDWIS and UCMR5 PFAS monitoring data. See our methodology for details. Retrieved and formatted by PlainWater Editorial

Every figure on PlainWater is rendered directly from EPA SDWIS drinking-water data, no number is typed in by an editor. This system's figures are rendered directly from EPA SDWIS data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.