D32/100
MT. SHASTA, CITY OF — Water Quality Report 2026
Serving 3,642 people · California
Water Source
Groundwater
County
—
System ID
CA4710008
Violations
13
Contaminant Test Results
2 contaminants above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
Copper (90th percentile) | 1.51 mg/L | 1.30 mg/L | Over Limit |
Lead (90th percentile) | 0.001 mg/L | 0.015 mg/L | Above Goal |
EPA Violation History
2
Violations (last 5yr)
2
Unresolved
1
Health-Related
TIER 3Unresolved
Reporting violation
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
TIER 2Unresolved
Treatment technique violation
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 MT. SHASTA, CITY OF
Is MT. SHASTA, CITY OF water safe to drink?
MT. SHASTA, CITY OF water receives a grade of D (32/100), which is considered poor. 1 contaminant(s) exceed EPA legal limits and 13 violation(s) are on record. Customers may want to consider using a water filter.
What contaminants has MT. SHASTA, CITY OF detected?
32 contaminants were tested in MT. SHASTA, 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 MT. SHASTA, CITY OF have any EPA violations?
Yes, MT. SHASTA, CITY OF has 13 EPA violation(s) on record, with the most recent in 2024. Violation types include RPT, TT, MCL. 11 are health-based violations.
How many people does MT. SHASTA, CITY OF serve?
MT. SHASTA, CITY OF serves approximately 3,642 people, California. The system provides water to 1 community: Mount Shasta.
What type of water does MT. SHASTA, CITY OF provide?
MT. SHASTA, CITY OF sources its water from groundwater. Groundwater is pumped from underground aquifers, which often provides natural filtration. The utility's system ID is CA4710008.
How does MT. SHASTA, CITY OF compare to other utilities in California?
MT. SHASTA, CITY OF scores 32/100 with a grade of D (poor). This score suggests significant water quality concerns relative to other utilities. Visit our California state page for a full comparison of water systems.