PlainWater

Community Water System · PWS ID4010085

Kuna City Of

Kuna, Idaho 83634 - drinking water served from groundwater sources to 32,038 people, tracked in EPA SDWIS and UCMR5.

32,038
People served
554
EPA violations
6
Health-based
No PFAS
UCMR5 result

The verdict

EPA records 554 drinking-water violations at Kuna City Of, 1% of them health-based - above the Idaho per-system average.

554
Total EPA violations on record
1%
Health-based (MCL / treatment failure)
32,038
People served by this system
0
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Kuna City Of

Kuna City Of is a local-owned community water system that delivers drinking water to 32,038 residents in Kuna, Idaho (Ada County) through 11,363 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 554 total violations for this system , of which 6 (1%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 547 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 BHC-GAMMA, recorded in 17 violations (MR). This system was sampled under EPA's UCMR5 PFAS monitoring program and no PFAS compounds were detected above the minimum reporting level.

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%).

Kuna City Of's 554 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
32,038
Total Violations
554
Health-Based Violations
6
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Local
Connections
11,363
County
Ada
School/Daycare
No
MCL Violations
6
Monitoring Violations
547
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
BHC-GAMMA MR 17 2020
Dalapon MR 17 2020
Glyphosate MR 17 2020
Di(2-ethylhexyl) adipate MR 17 2020
Simazine MR 17 2020
Picloram MR 17 2020
Carbofuran MR 17 2020
LASSO MR 17 2020
Heptachlor MR 17 2020
Heptachlor epoxide MR 17 2020
HEXACHLOROBENZENE MR 17 2020
Benzo(a)pyrene MR 17 2020
Pentachlorophenol MR 17 2020
Total Polychlorinated Biphenyls (PCB) MR 17 2020
1,2-DIBROMO-3-CHLOROPROPANE MR 17 2020
Chlordane MR 17 2020
Endrin MR 17 2020
Methoxychlor MR 17 2020
Atrazine MR 17 2020
2,4,5-TP MR 17 2020
ETHYLENE DIBROMIDE MR 17 2020
Toxaphene MR 17 2020
OXAMYL MR 17 2020
Di(2-ethylhexyl) phthalate MR 17 2020
2,4-D MR 17 2020
Diquat MR 17 2020
Hexachlorocyclopentadiene MR 17 2020
Dinoseb MR 17 2020
Endothall MR 17 2020
Chlorine MR 6 2022

PFAS Testing Results (UCMR5)

Results from EPA's Fifth Unregulated Contaminant Monitoring Rule. 0 of 290 samples detected PFAS.

Contaminant Date Result MRL Status
HFPO-DA 4/16/2025 <5.00 ppt 5.00 ppt Not Detected
8:2 FTS 4/16/2025 <5.00 ppt 5.00 ppt Not Detected
PFBS 4/16/2025 <3.00 ppt 3.00 ppt Not Detected
PFHpS 4/16/2025 <3.00 ppt 3.00 ppt Not Detected
PFPeS 4/16/2025 <4.00 ppt 4.00 ppt Not Detected
NFDHA 4/16/2025 <20.00 ppt 20.00 ppt Not Detected
PFEESA 4/16/2025 <3.00 ppt 3.00 ppt Not Detected
PFMBA 4/16/2025 <3.00 ppt 3.00 ppt Not Detected
PFMPA 4/16/2025 <4.00 ppt 4.00 ppt Not Detected
4:2 FTS 4/16/2025 <3.00 ppt 3.00 ppt Not Detected
6:2 FTS 4/16/2025 <5.00 ppt 5.00 ppt Not Detected
PFBA 4/16/2025 <5.00 ppt 5.00 ppt Not Detected
9Cl-PF3ONS 4/16/2025 <2.00 ppt 2.00 ppt Not Detected
ADONA 4/16/2025 <3.00 ppt 3.00 ppt Not Detected
PFNA 4/16/2025 <4.00 ppt 4.00 ppt Not Detected
PFPeA 4/16/2025 <3.00 ppt 3.00 ppt Not Detected
PFHxS 4/16/2025 <3.00 ppt 3.00 ppt Not Detected
11Cl-PF3OUdS 4/16/2025 <5.00 ppt 5.00 ppt Not Detected
PFOS 4/16/2025 <4.00 ppt 4.00 ppt Not Detected
PFTA 4/16/2025 <8.00 ppt 8.00 ppt Not Detected
PFTrDA 4/16/2025 <7.00 ppt 7.00 ppt Not Detected
NMeFOSAA 4/16/2025 <6.00 ppt 6.00 ppt Not Detected
PFOA 4/16/2025 <4.00 ppt 4.00 ppt Not Detected
PFDA 4/16/2025 <3.00 ppt 3.00 ppt Not Detected
PFDoA 4/16/2025 <3.00 ppt 3.00 ppt Not Detected
PFHxA 4/16/2025 <3.00 ppt 3.00 ppt Not Detected
PFUnA 4/16/2025 <2.00 ppt 2.00 ppt Not Detected
NEtFOSAA 4/16/2025 <5.00 ppt 5.00 ppt Not Detected
PFHpA 4/16/2025 <3.00 ppt 3.00 ppt Not Detected
PFHxA 4/16/2025 <3.00 ppt 3.00 ppt Not Detected
PFDoA 4/16/2025 <3.00 ppt 3.00 ppt Not Detected
PFHxS 4/16/2025 <3.00 ppt 3.00 ppt Not Detected
PFDA 4/16/2025 <3.00 ppt 3.00 ppt Not Detected
PFOA 4/16/2025 <4.00 ppt 4.00 ppt Not Detected
PFOS 4/16/2025 <4.00 ppt 4.00 ppt Not Detected
9Cl-PF3ONS 4/16/2025 <2.00 ppt 2.00 ppt Not Detected
PFNA 4/16/2025 <4.00 ppt 4.00 ppt Not Detected
PFEESA 4/16/2025 <3.00 ppt 3.00 ppt Not Detected
11Cl-PF3OUdS 4/16/2025 <5.00 ppt 5.00 ppt Not Detected
ADONA 4/16/2025 <3.00 ppt 3.00 ppt Not Detected
PFBA 4/16/2025 <5.00 ppt 5.00 ppt Not Detected
6:2 FTS 4/16/2025 <5.00 ppt 5.00 ppt Not Detected
4:2 FTS 4/16/2025 <3.00 ppt 3.00 ppt Not Detected
8:2 FTS 4/16/2025 <5.00 ppt 5.00 ppt Not Detected
PFMPA 4/16/2025 <4.00 ppt 4.00 ppt Not Detected
HFPO-DA 4/16/2025 <5.00 ppt 5.00 ppt Not Detected
PFMBA 4/16/2025 <3.00 ppt 3.00 ppt Not Detected
PFHpA 4/16/2025 <3.00 ppt 3.00 ppt Not Detected
NFDHA 4/16/2025 <20.00 ppt 20.00 ppt Not Detected
PFPeS 4/16/2025 <4.00 ppt 4.00 ppt Not Detected

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 Kuna City Of.

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 ID4010085 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
2022 Chlorine MR 6 SDWIS / ID4010085 / 0999
2020 BHC-GAMMA MR 17 SDWIS / ID4010085 / 2010
2020 Dalapon MR 17 SDWIS / ID4010085 / 2031
2020 Glyphosate MR 17 SDWIS / ID4010085 / 2034
2020 Di(2-ethylhexyl) adipate MR 17 SDWIS / ID4010085 / 2035
2020 Simazine MR 17 SDWIS / ID4010085 / 2037
2020 Picloram MR 17 SDWIS / ID4010085 / 2040
2020 Carbofuran MR 17 SDWIS / ID4010085 / 2046
2020 LASSO MR 17 SDWIS / ID4010085 / 2051
2020 Heptachlor MR 17 SDWIS / ID4010085 / 2065
2020 Heptachlor epoxide MR 17 SDWIS / ID4010085 / 2067
2020 HEXACHLOROBENZENE MR 17 SDWIS / ID4010085 / 2274
2020 Benzo(a)pyrene MR 17 SDWIS / ID4010085 / 2306
2020 Pentachlorophenol MR 17 SDWIS / ID4010085 / 2326
2020 Total Polychlorinated Biphenyls (PCB) MR 17 SDWIS / ID4010085 / 2383

How Kuna City Of Compares

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

Metric Kuna City Of Idaho avg Federal benchmark
Total violations 554 52.3 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 6 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 32,038 870 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 Kuna City Of water safe to drink?
Kuna City Of (PWS ID: ID4010085) has 554 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 32,038 people using Groundwater sources.
How many people does Kuna City Of serve?
Kuna City Of serves 32,038 people in Kuna, Idaho. It is a Local-owned system using Groundwater water sources with 11,363 service connections.
What type of violations does Kuna City Of have?
Kuna City Of has 554 total violations: 6 health-based violations (MCL exceedances or treatment failures), 547 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Kuna City Of water?
No. Kuna City Of was tested for PFAS under the EPA's UCMR5 monitoring program and no PFAS contamination was detected.
What water source does Kuna City Of use?
Kuna City Of 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. PFAS data from EPA UCMR5 monitoring program (2023-2025). This data is provided for informational purposes only.
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.