A82/100
ARLINGTON COUNTY — Water Quality Report 2026
Serving 215,000 people · Virginia
Water Source
Purchased Surface Water
County
—
System ID
VA6013010
Violations
4
Contaminant Test Results
2 contaminants above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
chlorate | 350.00 µg/L | — | Above Goal |
Lead (90th percentile) | < 0.001 mg/L | 0.015 mg/L | Above Goal |
EPA Violation History
No violations in the past 5 years
Full EPA compliance since 2007.
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 ARLINGTON COUNTY
Is ARLINGTON COUNTY water safe to drink?
ARLINGTON COUNTY water receives a grade of A (82/100), which is considered excellent. Out of 76 contaminants tested, none exceed EPA legal limits. 2 contaminant(s) exceed non-enforceable health goals. The water meets federal safety standards.
What contaminants has ARLINGTON COUNTY detected?
76 contaminants were tested in ARLINGTON COUNTY's water. Notable contaminants include Lead (90th percentile), chlorate. No contaminants exceed EPA legal limits. 2 exceed EPA health goals (MCLGs).
Does ARLINGTON COUNTY have any EPA violations?
Yes, ARLINGTON COUNTY has 4 EPA violation(s) on record, with the most recent in 2007. Violation types include MR, MCL. 2 are health-based violations.
How many people does ARLINGTON COUNTY serve?
ARLINGTON COUNTY serves approximately 215,000 people, Virginia.
What type of water does ARLINGTON COUNTY provide?
ARLINGTON COUNTY 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 VA6013010.
How does ARLINGTON COUNTY compare to other utilities in Virginia?
ARLINGTON COUNTY scores 82/100 with a grade of A (excellent). This places it among the higher-performing utilities in the state. Visit our Virginia state page for a full comparison of water systems.