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Community Water System · PWS ID4200026

King Hill Domestic Water and Sewer

King Hill, Idaho 83633 - drinking water served from groundwater sources to 87 people, tracked in EPA SDWIS and UCMR5.

87
People served
128
EPA violations
88
Health-based
Untested
UCMR5 result

The verdict

EPA records 128 drinking-water violations at King Hill Domestic Water and Sewer, 69% of them health-based - above the Idaho per-system average.

128
Total EPA violations on record
69%
Health-based (MCL / treatment failure)
87
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: King Hill Domestic Water and Sewer

King Hill Domestic Water and Sewer is a private-owned community water system that delivers drinking water to 87 residents in King Hill, Idaho (Elmore County) through 37 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 128 total violations for this system , of which 88 (69%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 33 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 46 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 Idaho, EPA tracks 2,005 public water systems serving 1,743,912 people, with 104,850 cumulative violations and 19,965 health-based violations on record. About 96% of systems in the state carry at least one violation, and state-wide the average per system is 52.3 violations. Statewide, 40 of 60 UCMR5-tested systems have reported PFAS detections (66.7%).

King Hill Domestic Water and Sewer's 128 violations sit above the Idaho 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
87
Total Violations
128
Health-Based Violations
88
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Private
Connections
37
County
Elmore
School/Daycare
No
MCL Violations
76
Monitoring Violations
33
Treatment Tech Violations
12

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Arsenic MCL 46 2025
Coliform (TCR) MCL 25 2015
Groundwater Rule TT 12 2014
Coliform (TCR) MR 10 2015
Lead and Copper Rule MR 6 1997
Revised Total Coliform Rule MON 5 2024
Fluoride MCL 5 1984
Nitrate MR 4 2009
Groundwater Rule Other 3 2022
Arsenic MR 2 2012
Public Notice Other 1 2012
Beryllium, Total MR 1 2002
Nickel MR 1 2002
CYANIDE MR 1 2002
Thallium, Total MR 1 2002
E. COLI MR 1 2025
Antimony, Total MR 1 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 King Hill Domestic Water and Sewer.

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 ID4200026 on SDWIS

Source: EPA SDWIS Federal Reports Search

State Regulator

Idaho Drinking Water Authority

Idaho'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 ID 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
2025 Arsenic MCL 46 SDWIS / ID4200026 / 1005
2025 E. COLI MR 1 SDWIS / ID4200026 / 3014
2024 Revised Total Coliform Rule MON 5 SDWIS / ID4200026 / 8000
2022 Groundwater Rule Other 3 SDWIS / ID4200026 / 0700
2015 Coliform (TCR) MCL 25 SDWIS / ID4200026 / 3100
2015 Coliform (TCR) MR 10 SDWIS / ID4200026 / 3100
2014 Groundwater Rule TT 12 SDWIS / ID4200026 / 0700
2012 Arsenic MR 2 SDWIS / ID4200026 / 1005
2012 Public Notice Other 1 SDWIS / ID4200026 / 7500
2009 Nitrate MR 4 SDWIS / ID4200026 / 1040
2002 Beryllium, Total MR 1 SDWIS / ID4200026 / 1075
2002 Nickel MR 1 SDWIS / ID4200026 / 1036
2002 CYANIDE MR 1 SDWIS / ID4200026 / 1024
2002 Thallium, Total MR 1 SDWIS / ID4200026 / 1085
2002 Antimony, Total MR 1 SDWIS / ID4200026 / 1074

How King Hill Domestic Water and Sewer Compares

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

Metric King Hill Domestic Water and Sewer Idaho avg Federal benchmark
Total violations 128 52.3 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 88 10 Indicates a contaminant exceeded a federal MCL
PFAS detection None 66.7% EPA final rule (2024): PFOA/PFOS MCL = 4.0 ppt
Population served 87 870 Sizing context for compliance burden

Sources: EPA SDWIS and EPA National Primary Drinking Water Regulations (40 CFR Part 141). State averages computed across 2,005 regulated public water systems in Idaho.

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 King Hill Domestic Water and Sewer water safe to drink? ▼
King Hill Domestic Water and Sewer (PWS ID: ID4200026) has 128 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 87 people using Groundwater sources.
How many people does King Hill Domestic Water and Sewer serve? ▼
King Hill Domestic Water and Sewer serves 87 people in King Hill, Idaho. It is a Private-owned system using Groundwater water sources with 37 service connections.
What type of violations does King Hill Domestic Water and Sewer have? ▼
King Hill Domestic Water and Sewer has 128 total violations: 88 health-based violations (MCL exceedances or treatment failures), 33 monitoring/reporting violations, and 12 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in King Hill Domestic Water and Sewer water? ▼
No PFAS testing data is available for King Hill Domestic Water and Sewer under the EPA's UCMR5 monitoring program.
What water source does King Hill Domestic Water and Sewer use? ▼
King Hill Domestic Water and Sewer 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.