C58/100
Rockville Tap Water Quality: Is It Safe to Drink? (2026 Report)
Serving 42,672 residents · Virginia
What's In Rockville's Tap Water?
69
Contaminants Tested
0
Exceed EPA Limits
0
Above EPA Goals
EPA Violation History
No violations in the past 5 years
Full EPA compliance since 2004.
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
MOUNTAIN VIEW
Population Served
2,773
Water Source
Groundwater
System ID
VA2023020
RAINBOW FOREST
Population Served
1,665
Water Source
Groundwater
System ID
VA2023480
LAKE MONTICELLO
Population Served
12,933
Water Source
Surface Water
System ID
VA2065480
LAKE HOLIDAY ESTATES
Population Served
2,130
Water Source
Groundwater
System ID
VA2069650
CAPTAINS COVE
Population Served
2,380
Water Source
Groundwater
System ID
VA3001100
QUEENS LAKE SYSTEM
Population Served
1,375
Water Source
Purchased Surface Water
System ID
VA3199700
AVONDALE
Population Served
1,285
Water Source
Groundwater
System ID
VA4085047
MAYFIELD FARMS
Population Served
1,444
Water Source
Purchased Surface Water
System ID
VA4085525
SPRING MEADOWS-MEADOW GATE
Population Served
2,362
Water Source
Groundwater
System ID
VA4085770
IRVINGTON COMMUNITY OF
Population Served
1,056
Water Source
Groundwater
System ID
VA4103550
POWHATAN COURTHOUSE
Population Served
3,005
Water Source
Groundwater
System ID
VA4145675
LAKE CAROLINE
Population Served
2,933
Water Source
Surface Water
System ID
VA6033425
LAKE LAND`OR
Population Served
4,818
Water Source
Groundwater
System ID
VA6033450
LAKE WILDERNESS
Population Served
2,513
Water Source
Groundwater
System ID
VA6177251
Frequently Asked Questions About Rockville Water
Is Rockville tap water safe to drink?
Rockville, Virginia tap water receives a grade of C (58/100), which is considered fair. 1 contaminant(s) exceed EPA maximum contaminant levels and 376 violation(s) are on record. Residents should consider using an NSF-certified water filter to reduce contaminant exposure.
What contaminants are in Rockville's water?
Of the 70 contaminants tested in Rockville's water supply, the most notable include Copper (90th percentile), Lead (90th percentile). 1 contaminant(s) exceed EPA legal limits (MCLs). 2 contaminant(s) exceed EPA health goals (MCLGs), which are non-enforceable targets set at levels with no known health risk.
Does Rockville have any water quality violations?
Yes, Rockville has 376 EPA violation(s) on record, with the most recent in 2023. Violation types include TT, MR, MON. 110 of these are health-based violations, which are the most serious category.
Do I need a water filter in Rockville?
Based on EPA data, using a water filter in Rockville 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 Rockville's tap water come from?
Rockville's drinking water is sourced from groundwater and supplied by MOUNTAIN VIEW and 13 other water system(s). The system serves approximately 42,672 people. Groundwater is pumped from underground aquifers, which often provides natural filtration.
How often is Rockville'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. Rockville'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 Rockville's water compare to other cities in Virginia?
Rockville's water quality score of 58/100 earns a grade of C, which is considered fair. This is a below-average score that indicates room for improvement. Visit our Virginia state page to see how all cities in the state compare.
What should I do if I'm concerned about Rockville's water quality?
If you have concerns about Rockville'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 (MOUNTAIN VIEW) 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.