Tap WaterIndex

← Virginia

Tap water quality report

Arlington, VA

EPA monitoring detected 15 contaminants across the 2 water suppliers serving Arlington. A detection doesn't automatically mean the water is unsafe — see the highest level found for each below, with its EPA source and period.

2
water suppliers
216,352
people served
15
contaminants found
Virginia rankings Lead in Virginia PFAS in Virginia

What was found in Arlington's water

The highest level seen across the city's suppliers, the EPA limit for each, and where the figure comes from.

ContaminantLevel vs EPA limitSuppliersSource
Copper
194 µg/L 15%
of the EPA limit 1300 µg/L
 2/2 SYR4
TTHM
74 µg/L 93%
of the EPA limit 80 µg/L
 2/2 SYR4
Chloroform
62 µg/L
No EPA limit set
 2/2 SYR4
Total Haloacetic Acids (HAA5)
52 µg/L 87%
of the EPA limit 60 µg/L
 2/2 SYR4
Dichloroacetic Acid
26.6 µg/L
No EPA limit set
 2/2 SYR4
Trichloroacetic Acid
23.3 µg/L
No EPA limit set
 2/2 SYR4
Bromodichloromethane
21.4 µg/L
No EPA limit set
 2/2 SYR4
Lead
16.6 µg/L 111%
of the EPA limit, in the worst sample — 15 µg/L
 2/2 SYR4
Dibromochloromethane
7.2 µg/L
No EPA limit set
 2/2 SYR4
Dibromoacetic Acid
4 µg/L
No EPA limit set
 2/2 SYR4
Monochloroacetic Acid
3.6 µg/L
No EPA limit set
 2/2 SYR4
Bromoform
0.7000 µg/L
No EPA limit set
 2/2 SYR4
Pfpea
0.0045 µg/L
No EPA limit set
 1/2 UCMR-5
Pfhxa
0.0033 µg/L
No EPA limit set
 1/2 UCMR-5
Lead
0.00060 mg/L 4%
of the EPA limit 0.0150 mg/L
 2/2 LCR
Each bar shows the measured level as a share of the EPA limit: green is well under, amber is close to it, red is over. For lead and copper the limit applies to exactly the 90th-percentile figure shown, so red there means a real exceedance. For everything else the limit applies to a running annual average while the figure is the single worst sample on record — over 100% is worth reading, but is not by itself a violation. Formal violations are listed separately. These are the utilities' own EPA-reported results, not a city-wide average. A detection means the lab measured the substance — it isn't the same as exceeding a legal limit. Hover a source tag to see the EPA program and years behind each figure.

Water suppliers serving Arlington

SupplierPopulation served
ARLINGTON COUNTY 215,000
ARLINGTON COUNTY - WILLSTON AREA 1,352

Frequently asked questions about Arlington tap water

Is Arlington tap water safe to drink?

EPA testing detected 15 contaminants in the water serving Arlington. A detection isn't the same as a violation — most detected levels are within federal limits. Check the level and source for each contaminant above, and your utility's annual Consumer Confidence Report for the official compliance status.

How many water suppliers serve Arlington?

2 public water suppliers report drinking-water monitoring for Arlington, Virginia to the EPA. Each is listed above with its population served.

What contaminants are in Arlington's water?

The contaminants EPA monitoring detected in Arlington include Copper, TTHM, Chloroform, Total Haloacetic Acids (HAA5), Dichloroacetic Acid. The full list, with the highest level found and the data source, is in the table above.

Where does this data come from?

Every figure is official EPA drinking-water monitoring — the Lead & Copper Rule, the UCMR-5 nationwide testing program, and the EPA Six-Year Review — not our own testing. Each number is labelled with its source and period.