PlainWater
States → Idaho

Community Water System · PWS ID7220051

Parker City Of

Parker, Idaho 83438 - drinking water served from groundwater sources to 322 people, tracked in EPA SDWIS and UCMR5.

322
People served
133
EPA violations
10
Health-based
Untested
UCMR5 result

The verdict

EPA records 133 drinking-water violations at Parker City Of, 8% of them health-based - above the Idaho per-system average.

133
Total EPA violations on record
8%
Health-based (MCL / treatment failure)
322
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Parker City Of

Parker City Of is a local-owned community water system that delivers drinking water to 322 residents in Parker, Idaho (Fremont County) through 125 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 133 total violations for this system , of which 10 (8%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 116 monitoring and reporting violations are on file. The most recent violation on record dates to 2023.

The most frequently cited contaminant at this system is Nitrate, recorded in 15 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%).

Parker City Of's 133 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
322
Total Violations
133
Health-Based Violations
10
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Local
Connections
125
County
Fremont
School/Daycare
No
MCL Violations
3
Monitoring Violations
116
Treatment Tech Violations
7

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Nitrate MR 15 2022
Coliform (TCR) MR 12 2014
Lead and Copper Rule MR 8 2023
Revised Total Coliform Rule MON 8 2017
Groundwater Rule TT 7 2023
Public Notice Other 4 2023
Gross Alpha, Excl. Radon and U MR 3 2008
Radium-228 MR 3 2008
Coliform (TCR) MCL 3 2005
Radium-226 MR 3 2008
Combined Uranium MR 3 2008
1,2,4-Trichlorobenzene MR 2 2008
cis-1,2-Dichloroethylene MR 2 2008
Xylenes, Total MR 2 2008
o-Dichlorobenzene MR 2 2008
p-Dichlorobenzene MR 2 2008
Vinyl chloride MR 2 2008
trans-1,2-Dichloroethylene MR 2 2008
1,1,1-Trichloroethane MR 2 2008
Carbon tetrachloride MR 2 2008
1,2-Dichloropropane MR 2 2008
Trichloroethylene MR 2 2008
Tetrachloroethylene MR 2 2008
Benzene MR 2 2008
Toluene MR 2 2008
Ethylbenzene MR 2 2008
DICHLOROMETHANE MR 2 2008
1,1-Dichloroethylene MR 2 2008
1,1,2-Trichloroethane MR 2 2008
CHLOROBENZENE MR 2 2008

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 Parker 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 ID7220051 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
2023 Lead and Copper Rule MR 8 SDWIS / ID7220051 / 5000
2023 Groundwater Rule TT 7 SDWIS / ID7220051 / 0700
2023 Public Notice Other 4 SDWIS / ID7220051 / 7500
2023 E. COLI MR 2 SDWIS / ID7220051 / 3014
2022 Nitrate MR 15 SDWIS / ID7220051 / 1040
2017 Revised Total Coliform Rule MON 8 SDWIS / ID7220051 / 8000
2014 Coliform (TCR) MR 12 SDWIS / ID7220051 / 3100
2008 Gross Alpha, Excl. Radon and U MR 3 SDWIS / ID7220051 / 4000
2008 Radium-228 MR 3 SDWIS / ID7220051 / 4030
2008 Radium-226 MR 3 SDWIS / ID7220051 / 4020
2008 Combined Uranium MR 3 SDWIS / ID7220051 / 4006
2008 1,2,4-Trichlorobenzene MR 2 SDWIS / ID7220051 / 2378
2008 cis-1,2-Dichloroethylene MR 2 SDWIS / ID7220051 / 2380
2008 Xylenes, Total MR 2 SDWIS / ID7220051 / 2955
2008 o-Dichlorobenzene MR 2 SDWIS / ID7220051 / 2968

How Parker City Of Compares

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

Metric Parker City Of Idaho avg Federal benchmark
Total violations 133 52.3 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 10 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 322 870 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 Parker City Of water safe to drink? ▼
Parker City Of (PWS ID: ID7220051) has 133 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 322 people using Groundwater sources.
How many people does Parker City Of serve? ▼
Parker City Of serves 322 people in Parker, Idaho. It is a Local-owned system using Groundwater water sources with 125 service connections.
What type of violations does Parker City Of have? ▼
Parker City Of has 133 total violations: 10 health-based violations (MCL exceedances or treatment failures), 116 monitoring/reporting violations, and 7 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Parker City Of water? ▼
No PFAS testing data is available for Parker City Of under the EPA's UCMR5 monitoring program.
What water source does Parker City Of use? ▼
Parker 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. 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.