A83/100
FLATHEAD COUNTY WATER AND SEWER — Water Quality Report 2026
Serving 7,775 people · Montana
Water Source
Groundwater
County
—
System ID
MT0001744
Violations
10
Contaminant Test Results
1 contaminant above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
Lead (90th percentile) | 0.001 mg/L | 0.015 mg/L | Above Goal |
EPA Violation History
1
Violation (last 5yr)
0
Unresolved
0
Health-Related
TIER 3Resolved
Monitoring / Reporting Violation
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
When: December 30, 2024 – August 29, 2024Rule: Ground Water RuleEnforcement: Resolving — corrective action underway
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 FLATHEAD COUNTY WATER AND SEWER
Is FLATHEAD COUNTY WATER AND SEWER water safe to drink?
FLATHEAD COUNTY WATER AND SEWER water receives a grade of A (83/100), which is considered excellent. Out of 48 contaminants tested, none exceed EPA legal limits. 1 contaminant(s) exceed non-enforceable health goals. The water meets federal safety standards.
What contaminants has FLATHEAD COUNTY WATER AND SEWER detected?
48 contaminants were tested in FLATHEAD COUNTY WATER AND SEWER's water. Notable contaminants include Lead (90th percentile). No contaminants exceed EPA legal limits. 1 exceed EPA health goals (MCLGs).
Does FLATHEAD COUNTY WATER AND SEWER have any EPA violations?
Yes, FLATHEAD COUNTY WATER AND SEWER has 10 EPA violation(s) on record, with the most recent in 2024. Violation types include MR, MCL. 1 are health-based violations.
How many people does FLATHEAD COUNTY WATER AND SEWER serve?
FLATHEAD COUNTY WATER AND SEWER serves approximately 7,775 people, Montana. The system provides water to 1 community: Kalispell.
What type of water does FLATHEAD COUNTY WATER AND SEWER provide?
FLATHEAD COUNTY WATER AND SEWER sources its water from groundwater. Groundwater is pumped from underground aquifers, which often provides natural filtration. The utility's system ID is MT0001744.
How does FLATHEAD COUNTY WATER AND SEWER compare to other utilities in Montana?
FLATHEAD COUNTY WATER AND SEWER scores 83/100 with a grade of A (excellent). This places it among the higher-performing utilities in the state. Visit our Montana state page for a full comparison of water systems.