F0/100
PLAINS TOWN OF — Water Quality Report 2026
Serving 1,700 people · Montana
Water Source
Groundwater
County
—
System ID
MT0000305
Violations
126
Contaminant Test Results
2 contaminants above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
Copper (90th percentile) | 1.49 mg/L | 1.30 mg/L | Over Limit |
Lead (90th percentile) | 0.002 mg/L | 0.015 mg/L | Above Goal |
EPA Violation History
2
Violations (last 5yr)
2
Unresolved
0
Health-Related
TIER 3Unresolved
Failed Level 2 Assessment under Revised Total Coliform Rule
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
When: January 1, 2025 – December 31, 2025Rule: Stage 2 DBPREnforcement: Informal — resolved cooperativelyVerify on EPA.gov
TIER 3Unresolved
Failed Level 2 Assessment under Revised Total Coliform Rule
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
When: January 1, 2025 – December 31, 2025Rule: Stage 2 DBPREnforcement: Informal — resolved cooperativelyVerify on EPA.gov
Understanding violation severity
Tier 1Urgent health risk. Utility must notify all customers within 24 hours.Tier 2Important health or treatment issue. Customers notified within 30 days.Tier 3Administrative or monitoring issue. Reported in the annual water quality report.
Source: EPA Safe Drinking Water Information System (SDWIS) · Updated quarterly
Frequently Asked Questions About PLAINS TOWN OF
Is PLAINS TOWN OF water safe to drink?
PLAINS TOWN OF water receives a grade of F (0/100), which is considered failing. 1 contaminant(s) exceed EPA legal limits and 126 violation(s) are on record. Customers may want to consider using a water filter.
What contaminants has PLAINS TOWN OF detected?
2 contaminants were tested in PLAINS TOWN OF's water. Notable contaminants include Copper (90th percentile), Lead (90th percentile). 1 exceed EPA legal limits (MCLs). 2 exceed EPA health goals (MCLGs).
Does PLAINS TOWN OF have any EPA violations?
Yes, PLAINS TOWN OF has 126 EPA violation(s) on record, with the most recent in 2025. Violation types include MR.
How many people does PLAINS TOWN OF serve?
PLAINS TOWN OF serves approximately 1,700 people, Montana. The system provides water to 1 community: Plains.
What type of water does PLAINS TOWN OF provide?
PLAINS TOWN OF sources its water from groundwater. Groundwater is pumped from underground aquifers, which often provides natural filtration. The utility's system ID is MT0000305.
How does PLAINS TOWN OF compare to other utilities in Montana?
PLAINS TOWN OF scores 0/100 with a grade of F (failing). This score suggests significant water quality concerns relative to other utilities. Visit our Montana state page for a full comparison of water systems.