A100/100
ST MARY HEADQUARTERS AND CG — Water Quality Report 2026
Serving 1,030 people · Montana
Water Source
Groundwater
County
—
System ID
MT0002729
Violations
0
Contaminant Test Results
1 contaminant above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
Lead (90th percentile) | 0.010 mg/L | 0.015 mg/L | Above Goal |
EPA Violation History
No violations in the past 5 years
This system has a clean compliance history.
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 ST MARY HEADQUARTERS AND CG
Is ST MARY HEADQUARTERS AND CG water safe to drink?
ST MARY HEADQUARTERS AND CG water receives a grade of A (100/100), which is considered excellent. Out of 1 contaminants tested, none exceed EPA legal limits. 1 contaminant(s) exceed non-enforceable health goals. The water meets federal safety standards.
What contaminants has ST MARY HEADQUARTERS AND CG detected?
1 contaminants were tested in ST MARY HEADQUARTERS AND CG's water. Notable contaminants include Lead (90th percentile). No contaminants exceed EPA legal limits. 1 exceed EPA health goals (MCLGs).
Does ST MARY HEADQUARTERS AND CG have any EPA violations?
No, ST MARY HEADQUARTERS AND CG has zero EPA violations on record. This indicates consistent compliance with federal drinking water standards.
How many people does ST MARY HEADQUARTERS AND CG serve?
ST MARY HEADQUARTERS AND CG serves approximately 1,030 people, Montana. The system provides water to 1 community: West Glacier.
What type of water does ST MARY HEADQUARTERS AND CG provide?
ST MARY HEADQUARTERS AND CG sources its water from groundwater. Groundwater is pumped from underground aquifers, which often provides natural filtration. The utility's system ID is MT0002729.
How does ST MARY HEADQUARTERS AND CG compare to other utilities in Montana?
ST MARY HEADQUARTERS AND CG scores 100/100 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.