Rockville, Virginia Water Quality Report
Water quality data for 165 water systems serving 72,337 people.
Water Source
Detected Contaminants
| Contaminant | Detected Level | EPA Limit (MCL) | Health Guideline | % of Limit | Status |
|---|---|---|---|---|---|
| lithium | 14.0 | No federal limit | 10.0 ug/L(EPA/USGS HBSL) | 140% | Above guideline |
| PFBS | 0.005 | No federal limit | 2000.0 ug/L(EPA Health Advisory) | 0% | Below guideline |
| PFHxA | 0.005 | No federal limit | 1000.0 ug/L(EWG) | 0% | Below guideline |
| PFPeA | 0.006 | No federal limit | 1000.0 ug/L(EWG) | 0% | Below guideline |
Recommended Water Filters
Based on the contaminants detected in your water supply, these filtration systems are recommended:
Reverse Osmosis (RO)
Reverse osmosis systems remove up to 99% of PFAS compounds. Recommended for homes with detected PFAS.
Up to 99% PFAS removal
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Compliance & Violations
Resolved Violations (1000)
27
Sep 1, 2025 — Sep 30, 2025
27
Aug 1, 2025 — Aug 31, 2025
3A
Aug 1, 2025 — Aug 31, 2025
3A
Aug 1, 2025 — Aug 31, 2025
27
Aug 1, 2025 — Aug 31, 2025
+ 995 more resolved violations
Frequently Asked Questions
Is Rockville tap water safe to drink?
Rockville's water meets all EPA maximum contaminant levels. However, 4 contaminants were detected at various levels. Some residents may prefer additional filtration for peace of mind.
What contaminants are in Rockville tap water?
4 contaminants have been detected in Rockville's water supply across 165 water systems. See the full contaminant table above for details.
How can I improve my water quality in Rockville?
Install a water filter rated for the specific contaminants found in Rockville's water. See our filter recommendations above. You can also request your utility's Consumer Confidence Report for the most current test results.
Does Rockville have any water quality violations?
Yes, Rockville currently has 368 active violations. See the violations section above for details.