F0/100
Rincon Northern — Water Quality Report 2026
Serving 7,003 people · California
Water Source
Groundwater
County
—
System ID
090600147
Violations
88
Contaminant Test Results
2 contaminants above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
Copper (90th percentile) | 2.32 mg/L | 1.30 mg/L | Over Limit |
Lead (90th percentile) | 0.005 mg/L | 0.015 mg/L | Above Goal |
EPA Violation History
No violations in the past 5 years
Full EPA compliance since 2016.
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 Rincon Northern
Is Rincon Northern water safe to drink?
Rincon Northern water receives a grade of F (0/100), which is considered failing. 1 contaminant(s) exceed EPA legal limits and 88 violation(s) are on record. Customers may want to consider using a water filter.
What contaminants has Rincon Northern detected?
32 contaminants were tested in Rincon Northern's water. Notable contaminants include Copper (90th percentile), Lead (90th percentile). 1 exceed EPA legal limits (MCLs). 2 exceed EPA health goals (MCLGs).
Does Rincon Northern have any EPA violations?
Yes, Rincon Northern has 88 EPA violation(s) on record, with the most recent in 2016. Violation types include MON, MR, MCL. 4 are health-based violations.
How many people does Rincon Northern serve?
Rincon Northern serves approximately 7,003 people, California.
What type of water does Rincon Northern provide?
Rincon Northern sources its water from groundwater. Groundwater is pumped from underground aquifers, which often provides natural filtration. The utility's system ID is 090600147.
How does Rincon Northern compare to other utilities in California?
Rincon Northern scores 0/100 with a grade of F (failing). This score suggests significant water quality concerns relative to other utilities. Visit our California state page for a full comparison of water systems.