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Community Water System · PWS ID6210021

Winder Water System

Preston, Idaho 83263 - drinking water served from groundwater sources to 20 people, tracked in EPA SDWIS and UCMR5.

20
People served
67
EPA violations
16
Health-based
Untested
UCMR5 result

The verdict

EPA records 67 drinking-water violations at Winder Water System, 24% of them health-based - above the Idaho per-system average.

67
Total EPA violations on record
24%
Health-based (MCL / treatment failure)
20
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Winder Water System

Winder Water System is a private-owned community water system that delivers drinking water to 20 residents in Preston, Idaho (Franklin County) through 30 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 67 total violations for this system , of which 16 (24%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 50 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 23 violations (MR). 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%).

Winder Water System's 67 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
20
Total Violations
67
Health-Based Violations
16
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Private
Connections
30
County
Franklin
School/Daycare
No
MCL Violations
16
Monitoring Violations
50
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Coliform (TCR) MR 23 1998
Coliform (TCR) MCL 16 1993
Lead and Copper Rule MR 6 2020
Nitrate MR 3 1999
Cadmium MR 3 1993
Selenium MR 3 1993
Fluoride MR 3 1993
Chromium MR 3 1993
Mercury MR 3 1993
Barium MR 3 1993

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 Winder Water System.

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 ID6210021 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 Lead and Copper Rule MR 6 SDWIS / ID6210021 / 5000
1999 Nitrate MR 3 SDWIS / ID6210021 / 1040
1998 Coliform (TCR) MR 23 SDWIS / ID6210021 / 3100
1993 Coliform (TCR) MCL 16 SDWIS / ID6210021 / 3100
1993 Cadmium MR 3 SDWIS / ID6210021 / 1015
1993 Selenium MR 3 SDWIS / ID6210021 / 1045
1993 Fluoride MR 3 SDWIS / ID6210021 / 1025
1993 Chromium MR 3 SDWIS / ID6210021 / 1020
1993 Mercury MR 3 SDWIS / ID6210021 / 1035
1993 Barium MR 3 SDWIS / ID6210021 / 1010

How Winder Water System Compares

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

Metric Winder Water System Idaho avg Federal benchmark
Total violations 67 52.3 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 16 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 20 870 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 Winder Water System water safe to drink? ▼
Winder Water System (PWS ID: ID6210021) has 67 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 20 people using Groundwater sources.
How many people does Winder Water System serve? ▼
Winder Water System serves 20 people in Preston, Idaho. It is a Private-owned system using Groundwater water sources with 30 service connections.
What type of violations does Winder Water System have? ▼
Winder Water System has 67 total violations: 16 health-based violations (MCL exceedances or treatment failures), 50 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Winder Water System water? ▼
No PFAS testing data is available for Winder Water System under the EPA's UCMR5 monitoring program.
What water source does Winder Water System use? ▼
Winder Water System 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.