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Community Water System · PWS ID1280008

Avondale Irrigation Dist

Hayden, Idaho 83835 - drinking water served from groundwater sources to 8,785 people, tracked in EPA SDWIS and UCMR5.

8,785
People served
49
EPA violations
5
Health-based
No PFAS
UCMR5 result

The verdict

EPA records 49 drinking-water violations at Avondale Irrigation Dist, 10% of them health-based - below the Idaho per-system average.

49
Total EPA violations on record
10%
Health-based (MCL / treatment failure)
8,785
People served by this system
0
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Avondale Irrigation Dist

Avondale Irrigation Dist is a local-owned community water system that delivers drinking water to 8,785 residents in Hayden, Idaho (Kootenai County) through 3,514 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 49 total violations for this system , of which 5 (10%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 44 monitoring and reporting violations are on file. The most recent violation on record dates to 2020.

The most frequently cited contaminant at this system is Coliform (TCR), recorded in 12 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%).

Avondale Irrigation Dist's 49 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
8,785
Total Violations
49
Health-Based Violations
5
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Local
Connections
3,514
County
Kootenai
School/Daycare
No
MCL Violations
5
Monitoring Violations
44
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Coliform (TCR) MR 12 2010
2,4-D MR 8 2020
Picloram MR 8 2020
Simazine MR 8 2020
Glyphosate MR 8 2020
Coliform (TCR) MCL 5 2006

PFAS Testing Results (UCMR5)

Results from EPA's Fifth Unregulated Contaminant Monitoring Rule. 0 of 232 samples detected PFAS.

Contaminant Date Result MRL Status
PFBA 5/9/2023 <5.00 ppt 5.00 ppt Not Detected
NEtFOSAA 5/9/2023 <5.00 ppt 5.00 ppt Not Detected
PFTrDA 5/9/2023 <7.00 ppt 7.00 ppt Not Detected
PFTA 5/9/2023 <8.00 ppt 8.00 ppt Not Detected
PFHpS 5/9/2023 <3.00 ppt 3.00 ppt Not Detected
PFPeS 5/9/2023 <4.00 ppt 4.00 ppt Not Detected
PFBS 5/9/2023 <3.00 ppt 3.00 ppt Not Detected
NFDHA 5/9/2023 <20.00 ppt 20.00 ppt Not Detected
PFEESA 5/9/2023 <3.00 ppt 3.00 ppt Not Detected
PFMBA 5/9/2023 <3.00 ppt 3.00 ppt Not Detected
PFPeA 5/9/2023 <3.00 ppt 3.00 ppt Not Detected
PFMPA 5/9/2023 <4.00 ppt 4.00 ppt Not Detected
NMeFOSAA 5/9/2023 <6.00 ppt 6.00 ppt Not Detected
4:2 FTS 5/9/2023 <3.00 ppt 3.00 ppt Not Detected
6:2 FTS 5/9/2023 <5.00 ppt 5.00 ppt Not Detected
ADONA 5/9/2023 <3.00 ppt 3.00 ppt Not Detected
9Cl-PF3ONS 5/9/2023 <2.00 ppt 2.00 ppt Not Detected
11Cl-PF3OUdS 5/9/2023 <5.00 ppt 5.00 ppt Not Detected
PFUnA 5/9/2023 <2.00 ppt 2.00 ppt Not Detected
PFHxA 5/9/2023 <3.00 ppt 3.00 ppt Not Detected
PFDoA 5/9/2023 <3.00 ppt 3.00 ppt Not Detected
PFDA 5/9/2023 <3.00 ppt 3.00 ppt Not Detected
PFOA 5/9/2023 <4.00 ppt 4.00 ppt Not Detected
PFOS 5/9/2023 <4.00 ppt 4.00 ppt Not Detected
PFNA 5/9/2023 <4.00 ppt 4.00 ppt Not Detected
PFHxS 5/9/2023 <3.00 ppt 3.00 ppt Not Detected
PFHpA 5/9/2023 <3.00 ppt 3.00 ppt Not Detected
8:2 FTS 5/9/2023 <5.00 ppt 5.00 ppt Not Detected
HFPO-DA 5/9/2023 <5.00 ppt 5.00 ppt Not Detected
PFBA 5/9/2023 <5.00 ppt 5.00 ppt Not Detected
11Cl-PF3OUdS 5/9/2023 <5.00 ppt 5.00 ppt Not Detected
HFPO-DA 5/9/2023 <5.00 ppt 5.00 ppt Not Detected
ADONA 5/9/2023 <3.00 ppt 3.00 ppt Not Detected
9Cl-PF3ONS 5/9/2023 <2.00 ppt 2.00 ppt Not Detected
PFUnA 5/9/2023 <2.00 ppt 2.00 ppt Not Detected
NMeFOSAA 5/9/2023 <6.00 ppt 6.00 ppt Not Detected
PFHxA 5/9/2023 <3.00 ppt 3.00 ppt Not Detected
PFDoA 5/9/2023 <3.00 ppt 3.00 ppt Not Detected
PFOA 5/9/2023 <4.00 ppt 4.00 ppt Not Detected
6:2 FTS 5/9/2023 <5.00 ppt 5.00 ppt Not Detected
PFDA 5/9/2023 <3.00 ppt 3.00 ppt Not Detected
4:2 FTS 5/9/2023 <3.00 ppt 3.00 ppt Not Detected
8:2 FTS 5/9/2023 <5.00 ppt 5.00 ppt Not Detected
PFMPA 5/9/2023 <4.00 ppt 4.00 ppt Not Detected
PFPeA 5/9/2023 <3.00 ppt 3.00 ppt Not Detected
PFMBA 5/9/2023 <3.00 ppt 3.00 ppt Not Detected
PFEESA 5/9/2023 <3.00 ppt 3.00 ppt Not Detected
NFDHA 5/9/2023 <20.00 ppt 20.00 ppt Not Detected
PFPeS 5/9/2023 <4.00 ppt 4.00 ppt Not Detected
PFHpS 5/9/2023 <3.00 ppt 3.00 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 Avondale 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 ID1280008 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
2020 2,4-D MR 8 SDWIS / ID1280008 / 2105
2020 Picloram MR 8 SDWIS / ID1280008 / 2040
2020 Simazine MR 8 SDWIS / ID1280008 / 2037
2020 Glyphosate MR 8 SDWIS / ID1280008 / 2034
2010 Coliform (TCR) MR 12 SDWIS / ID1280008 / 3100
2006 Coliform (TCR) MCL 5 SDWIS / ID1280008 / 3100

How Avondale Irrigation Dist Compares

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

Metric Avondale Irrigation Dist Idaho avg Federal benchmark
Total violations 49 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 8,785 870 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 Avondale Irrigation Dist water safe to drink? ▼
Avondale Irrigation Dist (PWS ID: ID1280008) has 49 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 8,785 people using Groundwater sources.
How many people does Avondale Irrigation Dist serve? ▼
Avondale Irrigation Dist serves 8,785 people in Hayden, Idaho. It is a Local-owned system using Groundwater water sources with 3,514 service connections.
What type of violations does Avondale Irrigation Dist have? ▼
Avondale Irrigation Dist has 49 total violations: 5 health-based violations (MCL exceedances or treatment failures), 44 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Avondale Irrigation Dist water? ▼
No. Avondale Irrigation Dist was tested for PFAS under the EPA's UCMR5 monitoring program and no PFAS contamination was detected.
What water source does Avondale Irrigation Dist use? ▼
Avondale 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.