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Key Mill Facility

PWS ID: WA53AA858 · Curlew, Washington 99118-9754

Key Mill Facility serves 65 people in Curlew, Washington using Groundwater water sources. It has 24 recorded EPA violations, including 0 health-based violations. No PFAS contamination was detected in UCMR5 testing.

Water Quality Snapshot: Key Mill Facility

Key Mill Facility is a private-owned non-transient non-community water system that delivers drinking water to 65 residents in Curlew, Washington (Ferry County) through 3 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 24 total violations for this system , of which 0 (0%) are health-based — meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 24 monitoring and reporting violations are on file. The most recent violation on record dates to 2008.

The most frequently cited contaminant at this system is Thallium, Total, recorded in 2 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. Key Mill Facility's 24 violations sit below 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
65
Total Violations
24
Health-Based Violations
0
Water Source
Groundwater

System Details

System Type
Non-Transient Non-Community
Owner Type
Private
Connections
3
County
Ferry
School/Daycare
No
MCL Violations
0
Monitoring Violations
24
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Thallium, Total MR 2 2008
CYANIDE MR 2 2008
Nickel MR 2 2008
Barium MR 2 2008
Fluoride MR 2 2008
Antimony, Total MR 2 2008
Beryllium, Total MR 2 2008
Mercury MR 2 2008
Arsenic MR 2 2008
Cadmium MR 2 2008
Chromium MR 2 2008
Selenium MR 2 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 Key Mill Facility.

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 WA53AA858 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 Key Mill Facility 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
2008 Thallium, Total MR 2 SDWIS / WA53AA858 / 1085
2008 CYANIDE MR 2 SDWIS / WA53AA858 / 1024
2008 Nickel MR 2 SDWIS / WA53AA858 / 1036
2008 Barium MR 2 SDWIS / WA53AA858 / 1010
2008 Fluoride MR 2 SDWIS / WA53AA858 / 1025
2008 Antimony, Total MR 2 SDWIS / WA53AA858 / 1074
2008 Beryllium, Total MR 2 SDWIS / WA53AA858 / 1075
2008 Mercury MR 2 SDWIS / WA53AA858 / 1035
2008 Arsenic MR 2 SDWIS / WA53AA858 / 1005
2008 Cadmium MR 2 SDWIS / WA53AA858 / 1015
2008 Chromium MR 2 SDWIS / WA53AA858 / 1020
2008 Selenium MR 2 SDWIS / WA53AA858 / 1045

How Key Mill Facility Compares

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

Metric Key Mill Facility Washington avg Federal benchmark
Total violations 24 69 SDWA compliance — any non-zero count is a recorded breach
Health-based violations 0 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 65 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 Key Mill Facility water safe to drink? ▼
Key Mill Facility (PWS ID: WA53AA858) has 24 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 65 people using Groundwater sources.
How many people does Key Mill Facility serve? ▼
Key Mill Facility serves 65 people in Curlew, Washington. It is a Private-owned system using Groundwater water sources with 3 service connections.
What type of violations does Key Mill Facility have? ▼
Key Mill Facility has 24 total violations: 0 health-based violations (MCL exceedances or treatment failures), 24 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Key Mill Facility water? ▼
No PFAS testing data is available for Key Mill Facility under the EPA's UCMR5 monitoring program.
What water source does Key Mill Facility use? ▼
Key Mill Facility uses Groundwater as its primary water source. It is classified as a Non-Transient Non-Community Water System, serving the same people for at least 6 months per year.
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 PlainWater Editorial