A81/100
EL DORADO ID - MAIN — Water Quality Report 2026
Serving 132,171 people · California
Water Source
Surface Water
County
—
System ID
CA0910001
Violations
4
Contaminant Test Results
1 contaminant above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
chlorate | 240.00 µg/L | — | Above Goal |
EPA Violation History
No violations in the past 5 years
Full EPA compliance since 2012.
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 EL DORADO ID - MAIN
Is EL DORADO ID - MAIN water safe to drink?
EL DORADO ID - MAIN water receives a grade of A (81/100), which is considered excellent. Out of 76 contaminants tested, none exceed EPA legal limits. 1 contaminant(s) exceed non-enforceable health goals. The water meets federal safety standards.
What contaminants has EL DORADO ID - MAIN detected?
76 contaminants were tested in EL DORADO ID - MAIN's water. Notable contaminants include chlorate. No contaminants exceed EPA legal limits. 1 exceed EPA health goals (MCLGs).
Does EL DORADO ID - MAIN have any EPA violations?
Yes, EL DORADO ID - MAIN has 4 EPA violation(s) on record, with the most recent in 2012. Violation types include MR, TT. 3 are health-based violations.
How many people does EL DORADO ID - MAIN serve?
EL DORADO ID - MAIN serves approximately 132,171 people, California.
What type of water does EL DORADO ID - MAIN provide?
EL DORADO ID - MAIN 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 CA0910001.
How does EL DORADO ID - MAIN compare to other utilities in California?
EL DORADO ID - MAIN scores 81/100 with a grade of A (excellent). This places it among the higher-performing utilities in the state. Visit our California state page for a full comparison of water systems.