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Tap water quality report

Winchester, VA

EPA monitoring detected 21 contaminants across the 2 water suppliers serving Winchester. A detection doesn't automatically mean the water is unsafe — see the level at the main supplier for each below, with its EPA source and period.

2
water suppliers
46,434
people served
21
contaminants found
Virginia rankings Lead in Virginia PFAS in Virginia

What was found in Winchester's water

The level at the city's main supplier, the highest level anywhere in the city, the EPA limit for each, and where every figure comes from.

ContaminantLevel vs EPA limitSuppliersSource
Nitrate-Nitrite
2939.5 µg/L 29%
of the EPA limit 10000 µg/L
Main supplier: FREDERICK WATER · 46,206 people · 2019
Highest in the city: 7563 µg/L — TAVENNER PARK · 228 people · 2019
2/2 SYR4
Fluoride
1142.5 µg/L 29%
of the EPA limit 4000 µg/L
Main supplier: FREDERICK WATER · 46,206 people · 2019
2/2 SYR4
Copper
194 µg/L 15%
of the EPA limit 1300 µg/L
Main supplier: FREDERICK WATER · 46,206 people · 2019
2/2 SYR4
Barium
67.25 µg/L 3.4%
of the EPA limit 2000 µg/L
Main supplier: FREDERICK WATER · 46,206 people · 2019
Highest in the city: 118 µg/L — TAVENNER PARK · 228 people · 2018
2/2 SYR4
TTHM
43 µg/L 54%
of the EPA limit 80 µg/L
Main supplier: FREDERICK WATER · 46,206 people · 2019
2/2 SYR4
Chloroform
32 µg/L
No EPA limit set
Main supplier: FREDERICK WATER · 46,206 people · 2019
2/2 SYR4
Total Haloacetic Acids (HAA5)
30 µg/L 50%
of the EPA limit 60 µg/L
Main supplier: FREDERICK WATER · 46,206 people · 2019
1/2 SYR4
Lead
22.2 µg/L 148%
of the EPA limit, at the 95th percentile of samples — 15 µg/L
Main supplier: FREDERICK WATER · 46,206 people · 2019
2/2 SYR4
Dichloroacetic Acid
18 µg/L
No EPA limit set
Main supplier: FREDERICK WATER · 46,206 people · 2019
1/2 SYR4
Trichloroacetic Acid
12 µg/L
No EPA limit set
Main supplier: FREDERICK WATER · 46,206 people · 2019
1/2 SYR4
Bromodichloromethane
9.085 µg/L
No EPA limit set
Main supplier: FREDERICK WATER · 46,206 people · 2019
2/2 SYR4
Chromium
4.09 µg/L 4.1%
of the EPA limit 100 µg/L
Highest in the city: TAVENNER PARK · 228 people · 2018
1/2 SYR4
Dibromochloromethane
3.4 µg/L
No EPA limit set
Main supplier: FREDERICK WATER · 46,206 people · 2019
1/2 SYR4
Gross Beta Particle Activity
2.89 pCi/L
No EPA limit set
Main supplier: FREDERICK WATER · 46,206 people · 2014
2/2 SYR4
Monochloroacetic Acid
2.4 µg/L
No EPA limit set
Main supplier: FREDERICK WATER · 46,206 people · 2019
1/2 SYR4
Gross Alpha, Excl. Radon And U
2.2 pCi/L 15%
of the EPA limit 15 pCi/L
Highest in the city: TAVENNER PARK · 228 people · 2016
1/2 SYR4
Dibromoacetic Acid
1.4 µg/L
No EPA limit set
Main supplier: FREDERICK WATER · 46,206 people · 2019
1/2 SYR4
Combined Radium (-226 And -228)
0.6000 pCi/L 12%
of the EPA limit 5 pCi/L
Main supplier: FREDERICK WATER · 46,206 people · 2014
Highest in the city: 1.0561 pCi/L — TAVENNER PARK · 228 people · 2016
2/2 SYR4
Combined Uranium
0.4875 µg/L 1.6%
of the EPA limit 30 µg/L
Highest in the city: TAVENNER PARK · 228 people · 2016
1/2 SYR4
PFBS
0.0069 µg/L
No EPA limit set
Main supplier: FREDERICK WATER · 46,206 people · 2025
1/2 UCMR-5
Lead
0.0 mg/L 0%
of the EPA limit 0.0150 mg/L
Main supplier: FREDERICK WATER · 46,206 people · 2025
Highest in the city: 0.0016 mg/L — TAVENNER PARK · 228 people · 2023
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 95th percentile of the system's samples — 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 Winchester

SupplierPopulation served
FREDERICK WATER 46,206
TAVENNER PARK 228

Frequently asked questions about Winchester tap water

Is Winchester tap water safe to drink?

EPA testing detected 21 contaminants in the water serving Winchester. 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 Winchester?

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

What contaminants are in Winchester's water?

The contaminants EPA monitoring detected in Winchester include Nitrate-Nitrite, Fluoride, Copper, Barium, TTHM. The full list, with the level at the main supplier 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.