D31/100
Rosamond Tap Water Quality: Is It Safe to Drink? (2026 Report)
Serving 17,711 residents · California
What's In Rosamond's Tap Water?
77
Contaminants Tested
1
Exceed EPA Limits
2
Above EPA Goals
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
Water Utility Details
ROSAMOND CSD
Population Served
17,711
Water Source
Purchased Surface Water
System ID
CA1510018
Frequently Asked Questions About Rosamond Water
Is Rosamond tap water safe to drink?
Rosamond, California tap water receives a grade of D (31/100), which is considered poor. 1 contaminant(s) exceed EPA maximum contaminant levels and 11 violation(s) are on record. Residents should consider using an NSF-certified water filter to reduce contaminant exposure.
What contaminants are in Rosamond's water?
Of the 77 contaminants tested in Rosamond's water supply, the most notable include Copper (90th percentile), chlorate, vanadium. 1 contaminant(s) exceed EPA legal limits (MCLs). 3 contaminant(s) exceed EPA health goals (MCLGs), which are non-enforceable targets set at levels with no known health risk.
Does Rosamond have any water quality violations?
Yes, Rosamond has 11 EPA violation(s) on record, with the most recent in 2008. Violation types include MCL. 11 of these are health-based violations, which are the most serious category.
Do I need a water filter in Rosamond?
Based on EPA data, using a water filter in Rosamond is recommended. 1 contaminant(s) exceed legal limits. An NSF-certified filter — such as a reverse osmosis or activated carbon system — can effectively reduce many common contaminants. Choose a filter certified to remove the specific contaminants found in your area.
Where does Rosamond's tap water come from?
Rosamond's drinking water is sourced from purchased surface water and supplied by ROSAMOND CSD. The system serves approximately 17,711 people. Surface water sources include rivers, lakes, and reservoirs.
How often is Rosamond's water tested?
Under the Safe Drinking Water Act (SDWA), water utilities are required to regularly test for over 90 contaminants. Testing frequency varies by contaminant — some are tested monthly, others quarterly or annually. Rosamond's water systems must report results to the EPA and publish an annual Consumer Confidence Report (CCR). The data on this page reflects the latest available EPA testing data.
How does Rosamond's water compare to other cities in California?
Rosamond's water quality score of 31/100 earns a grade of D, which is considered poor. This is a concerning score that suggests significant water quality issues. Visit our California state page to see how all cities in the state compare.
What should I do if I'm concerned about Rosamond's water quality?
If you have concerns about Rosamond's tap water, consider these steps: (1) Request your utility's annual Consumer Confidence Report for detailed local data. (2) Get your water independently tested through a state-certified laboratory. (3) Consider an NSF-certified water filter rated for the contaminants found in your area. (4) Contact your water utility (ROSAMOND CSD) with specific questions. (5) Report water quality issues to your state drinking water program or the EPA Safe Drinking Water Hotline at 800-426-4791.