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Community Water System · PWS ID7220049

North Fork Water Works

Rexburg, Idaho 83440 - drinking water served from groundwater sources to 64 people, tracked in EPA SDWIS and UCMR5.

64
People served
142
EPA violations
8
Health-based
Untested
UCMR5 result

The verdict

EPA records 142 drinking-water violations at North Fork Water Works, 6% of them health-based - above the Idaho per-system average.

142
Total EPA violations on record
6%
Health-based (MCL / treatment failure)
64
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: North Fork Water Works

North Fork Water Works is a local-owned community water system that delivers drinking water to 64 residents in Rexburg, Idaho (Fremont County) through 18 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 142 total violations for this system , of which 8 (6%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 132 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 Coliform (TCR), 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%).

North Fork Water Works's 142 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
64
Total Violations
142
Health-Based Violations
8
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Local
Connections
18
County
Fremont
School/Daycare
No
MCL Violations
8
Monitoring Violations
132
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Coliform (TCR) MR 15 2005
Coliform (TCR) MCL 8 2012
Nitrate MR 7 2023
Carbon tetrachloride MR 5 2018
1,2-Dichloropropane MR 5 2018
Trichloroethylene MR 5 2018
1,1,2-Trichloroethane MR 5 2018
Tetrachloroethylene MR 5 2018
Styrene MR 5 2018
1,2,4-Trichlorobenzene MR 5 2018
Xylenes, Total MR 5 2018
DICHLOROMETHANE MR 5 2018
o-Dichlorobenzene MR 5 2018
p-Dichlorobenzene MR 5 2018
Vinyl chloride MR 5 2018
trans-1,2-Dichloroethylene MR 5 2018
1,2-Dichloroethane MR 5 2018
1,1,1-Trichloroethane MR 5 2018
CHLOROBENZENE MR 5 2018
Benzene MR 5 2018
Toluene MR 5 2018
1,1-Dichloroethylene MR 5 2018
cis-1,2-Dichloroethylene MR 5 2018
Ethylbenzene MR 5 2018
Di(2-ethylhexyl) phthalate MR 2 1996
Arsenic MR 1 2005
Lead and Copper Rule MR 1 2005
Gross Alpha, Excl. Radon and U MR 1 1979

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 North Fork Water Works.

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 ID7220049 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 Nitrate MR 7 SDWIS / ID7220049 / 1040
2018 Carbon tetrachloride MR 5 SDWIS / ID7220049 / 2982
2018 1,2-Dichloropropane MR 5 SDWIS / ID7220049 / 2983
2018 Trichloroethylene MR 5 SDWIS / ID7220049 / 2984
2018 1,1,2-Trichloroethane MR 5 SDWIS / ID7220049 / 2985
2018 Tetrachloroethylene MR 5 SDWIS / ID7220049 / 2987
2018 Styrene MR 5 SDWIS / ID7220049 / 2996
2018 1,2,4-Trichlorobenzene MR 5 SDWIS / ID7220049 / 2378
2018 Xylenes, Total MR 5 SDWIS / ID7220049 / 2955
2018 DICHLOROMETHANE MR 5 SDWIS / ID7220049 / 2964
2018 o-Dichlorobenzene MR 5 SDWIS / ID7220049 / 2968
2018 p-Dichlorobenzene MR 5 SDWIS / ID7220049 / 2969
2018 Vinyl chloride MR 5 SDWIS / ID7220049 / 2976
2018 trans-1,2-Dichloroethylene MR 5 SDWIS / ID7220049 / 2979
2018 1,2-Dichloroethane MR 5 SDWIS / ID7220049 / 2980

How North Fork Water Works Compares

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

Metric North Fork Water Works Idaho avg Federal benchmark
Total violations 142 52.3 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 8 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 64 870 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 North Fork Water Works water safe to drink? ▼
North Fork Water Works (PWS ID: ID7220049) has 142 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 64 people using Groundwater sources.
How many people does North Fork Water Works serve? ▼
North Fork Water Works serves 64 people in Rexburg, Idaho. It is a Local-owned system using Groundwater water sources with 18 service connections.
What type of violations does North Fork Water Works have? ▼
North Fork Water Works has 142 total violations: 8 health-based violations (MCL exceedances or treatment failures), 132 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in North Fork Water Works water? ▼
No PFAS testing data is available for North Fork Water Works under the EPA's UCMR5 monitoring program.
What water source does North Fork Water Works use? ▼
North Fork Water Works 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.