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Community Water System · PWS ID1280087

Hayden Lake Irrigation Dist

Hayden, Idaho 83835 - drinking water served from groundwater sources to 9,375 people, tracked in EPA SDWIS and UCMR5.

9,375
People served
34
EPA violations
5
Health-based
No PFAS
UCMR5 result

The verdict

EPA records 34 drinking-water violations at Hayden Lake Irrigation Dist, 15% of them health-based - below the Idaho per-system average.

34
Total EPA violations on record
15%
Health-based (MCL / treatment failure)
9,375
People served by this system
0
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Hayden Lake Irrigation Dist

Hayden Lake Irrigation Dist is a public/private-owned community water system that delivers drinking water to 9,375 residents in Hayden, Idaho (Kootenai County) through 3,750 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 34 total violations for this system , of which 5 (15%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 28 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 Coliform (TCR), recorded in 5 violations (MCL, health-based). 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%).

Hayden Lake Irrigation Dist's 34 violations sit below 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
9,375
Total Violations
34
Health-Based Violations
5
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Public/Private
Connections
3,750
County
Kootenai
School/Daycare
No
MCL Violations
5
Monitoring Violations
28
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Coliform (TCR) MCL 5 2011
Nitrate MR 4 2006
Gross Alpha, Excl. Radon and U MR 4 2017
Arsenic MR 3 2002
Combined Uranium MR 3 2017
Nitrite MR 1 1993
Endrin MR 1 1979
BHC-GAMMA MR 1 1979
Cadmium MR 1 1979
Mercury MR 1 1979
Fluoride MR 1 1979
2,4-D MR 1 1979
Barium MR 1 1979
Selenium MR 1 1979
Chromium MR 1 1979
Toxaphene MR 1 1979
Coliform (TCR) MR 1 1992
Methoxychlor MR 1 1979
2,4,5-TP MR 1 1979

PFAS Testing Results (UCMR5)

Results from EPA's Fifth Unregulated Contaminant Monitoring Rule. 0 of 348 samples detected PFAS.

Contaminant Date Result MRL Status
PFUnA 7/10/2023 <2.00 ppt 2.00 ppt Not Detected
PFPeS 7/10/2023 <4.00 ppt 4.00 ppt Not Detected
NFDHA 7/10/2023 <20.00 ppt 20.00 ppt Not Detected
PFMBA 7/10/2023 <3.00 ppt 3.00 ppt Not Detected
PFMPA 7/10/2023 <4.00 ppt 4.00 ppt Not Detected
8:2 FTS 7/10/2023 <5.00 ppt 5.00 ppt Not Detected
4:2 FTS 7/10/2023 <3.00 ppt 3.00 ppt Not Detected
6:2 FTS 7/10/2023 <5.00 ppt 5.00 ppt Not Detected
PFBA 7/10/2023 <5.00 ppt 5.00 ppt Not Detected
HFPO-DA 7/10/2023 <5.00 ppt 5.00 ppt Not Detected
ADONA 7/10/2023 <3.00 ppt 3.00 ppt Not Detected
PFHpS 7/10/2023 <3.00 ppt 3.00 ppt Not Detected
11Cl-PF3OUdS 7/10/2023 <5.00 ppt 5.00 ppt Not Detected
PFEESA 7/10/2023 <3.00 ppt 3.00 ppt Not Detected
PFHxA 7/10/2023 <3.00 ppt 3.00 ppt Not Detected
PFDoA 7/10/2023 <3.00 ppt 3.00 ppt Not Detected
PFDA 7/10/2023 <3.00 ppt 3.00 ppt Not Detected
PFOA 7/10/2023 <4.00 ppt 4.00 ppt Not Detected
PFOS 7/10/2023 <4.00 ppt 4.00 ppt Not Detected
PFNA 7/10/2023 <4.00 ppt 4.00 ppt Not Detected
PFHxS 7/10/2023 <3.00 ppt 3.00 ppt Not Detected
PFHpA 7/10/2023 <3.00 ppt 3.00 ppt Not Detected
PFBS 7/10/2023 <3.00 ppt 3.00 ppt Not Detected
9Cl-PF3ONS 7/10/2023 <2.00 ppt 2.00 ppt Not Detected
PFPeA 7/10/2023 <3.00 ppt 3.00 ppt Not Detected
NMeFOSAA 7/10/2023 <6.00 ppt 6.00 ppt Not Detected
NEtFOSAA 7/10/2023 <5.00 ppt 5.00 ppt Not Detected
PFTrDA 7/10/2023 <7.00 ppt 7.00 ppt Not Detected
PFTA 7/10/2023 <8.00 ppt 8.00 ppt Not Detected
PFBA 7/10/2023 <5.00 ppt 5.00 ppt Not Detected
HFPO-DA 7/10/2023 <5.00 ppt 5.00 ppt Not Detected
PFHxS 7/10/2023 <3.00 ppt 3.00 ppt Not Detected
PFDoA 7/10/2023 <3.00 ppt 3.00 ppt Not Detected
9Cl-PF3ONS 7/10/2023 <2.00 ppt 2.00 ppt Not Detected
11Cl-PF3OUdS 7/10/2023 <5.00 ppt 5.00 ppt Not Detected
PFUnA 7/10/2023 <2.00 ppt 2.00 ppt Not Detected
PFHxA 7/10/2023 <3.00 ppt 3.00 ppt Not Detected
ADONA 7/10/2023 <3.00 ppt 3.00 ppt Not Detected
PFDA 7/10/2023 <3.00 ppt 3.00 ppt Not Detected
PFOA 7/10/2023 <4.00 ppt 4.00 ppt Not Detected
PFNA 7/10/2023 <4.00 ppt 4.00 ppt Not Detected
PFHpA 7/10/2023 <3.00 ppt 3.00 ppt Not Detected
PFBS 7/10/2023 <3.00 ppt 3.00 ppt Not Detected
6:2 FTS 7/10/2023 <5.00 ppt 5.00 ppt Not Detected
PFMBA 7/10/2023 <3.00 ppt 3.00 ppt Not Detected
PFOS 7/10/2023 <4.00 ppt 4.00 ppt Not Detected
PFHpS 7/10/2023 <3.00 ppt 3.00 ppt Not Detected
4:2 FTS 7/10/2023 <3.00 ppt 3.00 ppt Not Detected
NEtFOSAA 7/10/2023 <5.00 ppt 5.00 ppt Not Detected
PFMPA 7/10/2023 <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 Hayden Lake Irrigation Dist.

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 ID1280087 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
2017 Gross Alpha, Excl. Radon and U MR 4 SDWIS / ID1280087 / 4000
2017 Combined Uranium MR 3 SDWIS / ID1280087 / 4006
2011 Coliform (TCR) MCL 5 SDWIS / ID1280087 / 3100
2006 Nitrate MR 4 SDWIS / ID1280087 / 1040
2002 Arsenic MR 3 SDWIS / ID1280087 / 1005
1993 Nitrite MR 1 SDWIS / ID1280087 / 1041
1992 Coliform (TCR) MR 1 SDWIS / ID1280087 / 3100
1979 Endrin MR 1 SDWIS / ID1280087 / 2005
1979 BHC-GAMMA MR 1 SDWIS / ID1280087 / 2010
1979 Cadmium MR 1 SDWIS / ID1280087 / 1015
1979 Mercury MR 1 SDWIS / ID1280087 / 1035
1979 Fluoride MR 1 SDWIS / ID1280087 / 1025
1979 2,4-D MR 1 SDWIS / ID1280087 / 2105
1979 Barium MR 1 SDWIS / ID1280087 / 1010
1979 Selenium MR 1 SDWIS / ID1280087 / 1045

How Hayden Lake Irrigation Dist Compares

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

Metric Hayden Lake Irrigation Dist Idaho avg Federal benchmark
Total violations 34 52.3 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 5 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 9,375 870 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 Hayden Lake Irrigation Dist water safe to drink? ▼
Hayden Lake Irrigation Dist (PWS ID: ID1280087) has 34 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 9,375 people using Groundwater sources.
How many people does Hayden Lake Irrigation Dist serve? ▼
Hayden Lake Irrigation Dist serves 9,375 people in Hayden, Idaho. It is a Public/Private-owned system using Groundwater water sources with 3,750 service connections.
What type of violations does Hayden Lake Irrigation Dist have? ▼
Hayden Lake Irrigation Dist has 34 total violations: 5 health-based violations (MCL exceedances or treatment failures), 28 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Hayden Lake Irrigation Dist water? ▼
No. Hayden Lake Irrigation Dist was tested for PFAS under the EPA's UCMR5 monitoring program and no PFAS contamination was detected.
What water source does Hayden Lake Irrigation Dist use? ▼
Hayden Lake Irrigation Dist 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.

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.