A80/100
DURHAM IRRIGATION DISTRICT — Water Quality Report 2026
Serving 1,581 people · California
Water Source
Groundwater
County
—
System ID
CA0410003
Violations
5
Contaminant Test Results
1 contaminant above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
Lead (90th percentile) | < 0.001 mg/L | 0.015 mg/L | Above Goal |
EPA Violation History
1
Violation (last 5yr)
0
Unresolved
0
Health-Related
TIER 3Resolved
Exceeded the MCL for disinfection byproducts
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
When: January 1, 2024 – December 31, 2024Enforcement: Formal — state order issued
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 DURHAM IRRIGATION DISTRICT
Is DURHAM IRRIGATION DISTRICT water safe to drink?
DURHAM IRRIGATION DISTRICT water receives a grade of A (80/100), 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 DURHAM IRRIGATION DISTRICT detected?
1 contaminants were tested in DURHAM IRRIGATION DISTRICT's water. Notable contaminants include Lead (90th percentile). No contaminants exceed EPA legal limits. 1 exceed EPA health goals (MCLGs).
Does DURHAM IRRIGATION DISTRICT have any EPA violations?
Yes, DURHAM IRRIGATION DISTRICT has 5 EPA violation(s) on record, with the most recent in 2024. Violation types include MR, MCL. 3 are health-based violations.
How many people does DURHAM IRRIGATION DISTRICT serve?
DURHAM IRRIGATION DISTRICT serves approximately 1,581 people, California.
What type of water does DURHAM IRRIGATION DISTRICT provide?
DURHAM IRRIGATION DISTRICT sources its water from groundwater. Groundwater is pumped from underground aquifers, which often provides natural filtration. The utility's system ID is CA0410003.
How does DURHAM IRRIGATION DISTRICT compare to other utilities in California?
DURHAM IRRIGATION DISTRICT scores 80/100 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.