C41/100
ST MARIES CITY OF — Water Quality Report 2026
Serving 4,173 people · Idaho
Water Source
Surface Water
County
—
System ID
ID1050024
Violations
24
Contaminant Test Results
2 contaminants above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
Copper (90th percentile) | 1.74 mg/L | 1.30 mg/L | Over Limit |
Lead (90th percentile) | 0.001 mg/L | 0.015 mg/L | Above Goal |
EPA Violation History
No violations in the past 5 years
Full EPA compliance since 2006.
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 MARIES CITY OF
Is ST MARIES CITY OF water safe to drink?
ST MARIES CITY OF water receives a grade of C (41/100), which is considered fair. 1 contaminant(s) exceed EPA legal limits and 24 violation(s) are on record. Customers may want to consider using a water filter.
What contaminants has ST MARIES CITY OF detected?
5 contaminants were tested in ST MARIES CITY 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 ST MARIES CITY OF have any EPA violations?
Yes, ST MARIES CITY OF has 24 EPA violation(s) on record, with the most recent in 2006. Violation types include MR, TT, MCL. 6 are health-based violations.
How many people does ST MARIES CITY OF serve?
ST MARIES CITY OF serves approximately 4,173 people, Idaho.
What type of water does ST MARIES CITY OF provide?
ST MARIES CITY OF sources its water from surface water. Surface water comes from rivers, lakes, or reservoirs and typically requires more extensive treatment. The utility's system ID is ID1050024.
How does ST MARIES CITY OF compare to other utilities in Idaho?
ST MARIES CITY OF scores 41/100 with a grade of C (fair). This score indicates room for improvement compared to other utilities. Visit our Idaho state page for a full comparison of water systems.