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Community Water System · PWS ID6030002

Arimo City Of

Arimo, Idaho 83214 - drinking water served from groundwater sources to 368 people, tracked in EPA SDWIS and UCMR5.

368
People served
63
EPA violations
12
Health-based
Untested
UCMR5 result

The verdict

EPA records 63 drinking-water violations at Arimo City Of, 19% of them health-based - above the Idaho per-system average.

63
Total EPA violations on record
19%
Health-based (MCL / treatment failure)
368
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Arimo City Of

Arimo City Of is a local-owned community water system that delivers drinking water to 368 residents in Arimo, Idaho (Bannock County) through 135 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 63 total violations for this system , of which 12 (19%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 45 monitoring and reporting violations are on file. The most recent violation on record dates to 2025.

The most frequently cited contaminant at this system is Coliform (TCR), recorded in 14 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%).

Arimo City Of's 63 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
368
Total Violations
63
Health-Based Violations
12
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Local
Connections
135
County
Bannock
School/Daycare
No
MCL Violations
12
Monitoring Violations
45
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Coliform (TCR) MR 14 2011
Lead and Copper Rule MR 10 2014
Coliform (TCR) MCL 8 2001
LEAD AND COPPER RULE REVISIONS RPT 4 2025
Chlorine MR 4 2018
Revised Total Coliform Rule MCL 4 2024
Revised Total Coliform Rule MON 3 2018
Nitrate MR 2 1997
Cadmium MR 2 1993
Mercury MR 2 1993
Fluoride MR 2 1993
Chromium MR 2 1993
Barium MR 2 1993
Selenium MR 2 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 Arimo 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 ID6030002 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
2025 LEAD AND COPPER RULE REVISIONS RPT 4 SDWIS / ID6030002 / 5200
2024 Revised Total Coliform Rule MCL 4 SDWIS / ID6030002 / 8000
2018 Chlorine MR 4 SDWIS / ID6030002 / 0999
2018 Revised Total Coliform Rule MON 3 SDWIS / ID6030002 / 8000
2014 Lead and Copper Rule MR 10 SDWIS / ID6030002 / 5000
2011 Coliform (TCR) MR 14 SDWIS / ID6030002 / 3100
2001 Coliform (TCR) MCL 8 SDWIS / ID6030002 / 3100
1997 Nitrate MR 2 SDWIS / ID6030002 / 1040
1993 Cadmium MR 2 SDWIS / ID6030002 / 1015
1993 Mercury MR 2 SDWIS / ID6030002 / 1035
1993 Fluoride MR 2 SDWIS / ID6030002 / 1025
1993 Chromium MR 2 SDWIS / ID6030002 / 1020
1993 Barium MR 2 SDWIS / ID6030002 / 1010
1993 Selenium MR 2 SDWIS / ID6030002 / 1045

How Arimo City Of Compares

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

Metric Arimo City Of Idaho avg Federal benchmark
Total violations 63 52.3 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 12 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 368 870 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 Arimo City Of water safe to drink? ▼
Arimo City Of (PWS ID: ID6030002) has 63 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 368 people using Groundwater sources.
How many people does Arimo City Of serve? ▼
Arimo City Of serves 368 people in Arimo, Idaho. It is a Local-owned system using Groundwater water sources with 135 service connections.
What type of violations does Arimo City Of have? ▼
Arimo City Of has 63 total violations: 12 health-based violations (MCL exceedances or treatment failures), 45 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Arimo City Of water? ▼
No PFAS testing data is available for Arimo City Of under the EPA's UCMR5 monitoring program.
What water source does Arimo City Of use? ▼
Arimo 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.