D31/100
ROSAMOND CSD — Water Quality Report 2026
Serving 17,711 people · California
Water Source
Purchased Surface Water
County
—
System ID
CA1510018
Violations
11
Contaminant Test Results
3 contaminants above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
Copper (90th percentile) | 1.38 mg/L | 1.30 mg/L | Over Limit |
chlorate | 220.00 µg/L | — | Above Goal |
vanadium | 26.00 µg/L | — | Above Goal |
EPA Violation History
No violations in the past 5 years
Full EPA compliance since 2008.
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 ROSAMOND CSD
Is ROSAMOND CSD water safe to drink?
ROSAMOND CSD water receives a grade of D (31/100), which is considered poor. 1 contaminant(s) exceed EPA legal limits and 11 violation(s) are on record. Customers may want to consider using a water filter.
What contaminants has ROSAMOND CSD detected?
77 contaminants were tested in ROSAMOND CSD's water. Notable contaminants include Copper (90th percentile), chlorate, vanadium. 1 exceed EPA legal limits (MCLs). 3 exceed EPA health goals (MCLGs).
Does ROSAMOND CSD have any EPA violations?
Yes, ROSAMOND CSD has 11 EPA violation(s) on record, with the most recent in 2008. Violation types include MCL. 11 are health-based violations.
How many people does ROSAMOND CSD serve?
ROSAMOND CSD serves approximately 17,711 people, California.
What type of water does ROSAMOND CSD provide?
ROSAMOND CSD sources its water from purchased surface water. Surface water comes from rivers, lakes, or reservoirs and typically requires more extensive treatment. The utility's system ID is CA1510018.
How does ROSAMOND CSD compare to other utilities in California?
ROSAMOND CSD scores 31/100 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.