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Community Water System · PWS KY0670462

Letcher County Water District

Mayking, Kentucky 41837 - drinking water served from surface water sources to 2,673 people, tracked in EPA SDWIS and UCMR5.

2,673
People served
254
EPA violations
159
Health-based
Untested
UCMR5 result

The verdict

EPA records 254 drinking-water violations at Letcher County Water District, 63% of them health-based - above the Kentucky per-system average.

254
Total EPA violations on record
63%
Health-based (MCL / treatment failure)
2,673
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Letcher County Water District

Letcher County Water District is a local-owned community water system that delivers drinking water to 2,673 residents in Mayking, Kentucky (Letcher County) through 3,048 service connections. Its water is drawn from surface water sources. EPA's Safe Drinking Water Information System records 254 total violations for this system , of which 159 (63%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 78 monitoring and reporting violations are on file. The most recent violation on record dates to 2017.

The most frequently cited contaminant at this system is TTHM, recorded in 77 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 Kentucky, EPA tracks 424 public water systems serving 4,570,541 people, with 80,482 cumulative violations and 12,554 health-based violations on record. About 99% of systems in the state carry at least one violation, and state-wide the average per system is 189.8 violations. Statewide, 107 of 231 UCMR5-tested systems have reported PFAS detections (46.3%).

Letcher County Water District's 254 violations sit above the Kentucky 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
2,673
Total Violations
254
Health-Based Violations
159
Water Source
Surface Water

System Details

System Type
Community
Owner Type
Local
Connections
3,048
County
Letcher
School/Daycare
No
MCL Violations
117
Monitoring Violations
78
Treatment Tech Violations
42

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
TTHM MCL 77 2017
Total Haloacetic Acids (HAA5) MCL 40 2016
CARBON, TOTAL TT 26 2008
Surface Water Treatment Rule MR 15 2013
Revised Total Coliform Rule MON 15 2016
Surface Water Treatment Rule TT 12 2006
Public Notice Other 12 2017
Interim Enhanced Surface Water Treatment Rule MR 11 2006
Total Haloacetic Acids (HAA5) MR 9 2014
TTHM MR 9 2014
Coliform (TCR) MR 7 2002
Lead and Copper Rule MR 5 2003
Interim Enhanced Surface Water Treatment Rule TT 4 2007
Asbestos MR 4 2002
CARBON, TOTAL MR 3 2004

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 Letcher County Water District.

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 KY0670462 on SDWIS

Source: EPA SDWIS Federal Reports Search

State Regulator

Kentucky Drinking Water Authority

Kentucky's primacy agency administers the Safe Drinking Water Act locally. Search EPA SDWIS for the current state contact, or use the state's public health or environment department portal.

Find KY regulator via EPA SDWIS

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
2017 TTHM MCL 77 SDWIS / KY0670462 / 2950
2017 Public Notice Other 12 SDWIS / KY0670462 / 7500
2016 Total Haloacetic Acids (HAA5) MCL 40 SDWIS / KY0670462 / 2456
2016 Revised Total Coliform Rule MON 15 SDWIS / KY0670462 / 8000
2014 Total Haloacetic Acids (HAA5) MR 9 SDWIS / KY0670462 / 2456
2014 TTHM MR 9 SDWIS / KY0670462 / 2950
2013 Surface Water Treatment Rule MR 15 SDWIS / KY0670462 / 0200
2008 CARBON, TOTAL TT 26 SDWIS / KY0670462 / 2920
2007 Interim Enhanced Surface Water Treatment Rule TT 4 SDWIS / KY0670462 / 0300
2006 Surface Water Treatment Rule TT 12 SDWIS / KY0670462 / 0200
2006 Interim Enhanced Surface Water Treatment Rule MR 11 SDWIS / KY0670462 / 0300
2004 CARBON, TOTAL MR 3 SDWIS / KY0670462 / 2920
2003 Lead and Copper Rule MR 5 SDWIS / KY0670462 / 5000
2002 Coliform (TCR) MR 7 SDWIS / KY0670462 / 3100
2002 Asbestos MR 4 SDWIS / KY0670462 / 1094

How Letcher County Water District Compares

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

Metric Letcher County Water District Kentucky avg Federal benchmark
Total violations 254 189.8 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 159 29.6 Indicates a contaminant exceeded a federal MCL
PFAS detection None 46.3% EPA final rule (2024): PFOA/PFOS MCL = 4.0 ppt
Population served 2,673 10,780 Sizing context for compliance burden

Sources: EPA SDWIS and EPA National Primary Drinking Water Regulations (40 CFR Part 141). State averages computed across 424 regulated public water systems in Kentucky.

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 Letcher County Water District water safe to drink? ▼
Letcher County Water District (PWS ID: KY0670462) has 254 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 2,673 people using Surface Water sources.
How many people does Letcher County Water District serve? ▼
Letcher County Water District serves 2,673 people in Mayking, Kentucky. It is a Local-owned system using Surface Water water sources with 3,048 service connections.
What type of violations does Letcher County Water District have? ▼
Letcher County Water District has 254 total violations: 159 health-based violations (MCL exceedances or treatment failures), 78 monitoring/reporting violations, and 42 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Letcher County Water District water? ▼
No PFAS testing data is available for Letcher County Water District under the EPA's UCMR5 monitoring program.
What water source does Letcher County Water District use? ▼
Letcher County Water District uses Surface Water 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.