B75/100
COTTONWOOD WATER DISTRICT — Water Quality Report 2026
Serving 3,316 people · California
Water Source
Groundwater
County
—
System ID
CA4510007
Violations
6
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
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 COTTONWOOD WATER DISTRICT
Is COTTONWOOD WATER DISTRICT water safe to drink?
COTTONWOOD WATER DISTRICT water receives a grade of B (75/100), which is considered good. Out of 31 contaminants tested, none exceed EPA legal limits. 1 contaminant(s) exceed non-enforceable health goals. The water meets federal safety standards.
What contaminants has COTTONWOOD WATER DISTRICT detected?
31 contaminants were tested in COTTONWOOD WATER DISTRICT's water. Notable contaminants include Lead (90th percentile). No contaminants exceed EPA legal limits. 1 exceed EPA health goals (MCLGs).
Does COTTONWOOD WATER DISTRICT have any EPA violations?
Yes, COTTONWOOD WATER DISTRICT has 6 EPA violation(s) on record, with the most recent in 2024. Violation types include RPT, TT, MCL. 4 are health-based violations.
How many people does COTTONWOOD WATER DISTRICT serve?
COTTONWOOD WATER DISTRICT serves approximately 3,316 people, California.
What type of water does COTTONWOOD WATER DISTRICT provide?
COTTONWOOD WATER DISTRICT sources its water from groundwater. Groundwater is pumped from underground aquifers, which often provides natural filtration. The utility's system ID is CA4510007.
How does COTTONWOOD WATER DISTRICT compare to other utilities in California?
COTTONWOOD WATER DISTRICT scores 75/100 with a grade of B (good). This is an above-average performance for utilities statewide. Visit our California state page for a full comparison of water systems.