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Tap water quality report

Warrenton, VA

EPA monitoring detected 42 contaminants across the 18 water suppliers serving Warrenton. 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.

18
water suppliers
30,909
people served
42
contaminants found
Virginia rankings Lead in Virginia PFAS in Virginia

What was found in Warrenton'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
3845.5 µg/L 38%
of the EPA limit 10000 µg/L
Main supplier: WARRENTON, TOWN OF · 11,801 people · 2019
Highest in the city: 7350 µg/L — PLAINS, THE · 566 people · 2019
15/18 SYR4
Fluoride
930 µg/L 23%
of the EPA limit 4000 µg/L
Main supplier: WARRENTON, TOWN OF · 11,801 people · 2019
6/18 SYR4
Copper
496.6 µg/L 38%
of the EPA limit 1300 µg/L
Main supplier: WARRENTON, TOWN OF · 11,801 people · 2019
Highest in the city: 772.4 µg/L — MARSHALL WATERWORKS · 2,363 people · 2018
18/18 SYR4
Barium
27.75 µg/L 1.4%
of the EPA limit 2000 µg/L
Main supplier: WARRENTON, TOWN OF · 11,801 people · 2019
Highest in the city: 348.9 µg/L — WHITEWOOD FOREST · 70 people · 2017
18/18 SYR4
TTHM
110 µg/L 138%
of the EPA limit, at the 95th percentile of samples — 80 µg/L
Main supplier: WARRENTON, TOWN OF · 11,801 people · 2019
16/18 SYR4
Chloroform
92 µg/L
No EPA limit set
Main supplier: WARRENTON, TOWN OF · 11,801 people · 2019
16/18 SYR4
Lithium
86 µg/L
No EPA limit set
Highest in the city: BEALETON REGIONAL · 4,250 people · 2025
3/18 UCMR-5
Lead
32.5 µg/L 217%
of the EPA limit, at the 95th percentile of samples — 15 µg/L
Main supplier: WARRENTON, TOWN OF · 11,801 people · 2019
Highest in the city: 79.06 µg/L — NEW BALTIMORE REGIONAL · 8,818 people · 2019
16/18 SYR4
Total Haloacetic Acids (HAA5)
37.8 µg/L 63%
of the EPA limit 60 µg/L
Main supplier: WARRENTON, TOWN OF · 11,801 people · 2019
14/18 SYR4
Chromium
35 µg/L 35%
of the EPA limit 100 µg/L
Highest in the city: WATERLOO ESTATES · 213 people · 2019
2/18 SYR4
Gross Alpha, Excl. Radon And U
25.4 pCi/L 169%
of the EPA limit, at the 95th percentile of samples — 15 pCi/L
Highest in the city: FAUQUIER SPRINGS · 160 people · 2018
2/18 SYR4
Trichloroacetic Acid
21.05 µg/L
No EPA limit set
Main supplier: WARRENTON, TOWN OF · 11,801 people · 2019
8/18 SYR4
Gross Beta Particle Activity
5.74 pCi/L
No EPA limit set
Main supplier: WARRENTON, TOWN OF · 11,801 people · 2019
Highest in the city: 18.205 pCi/L — MARSHALL WATERWORKS · 2,363 people · 2019
18/18 SYR4
Dichloroacetic Acid
17.8 µg/L
No EPA limit set
Main supplier: WARRENTON, TOWN OF · 11,801 people · 2019
14/18 SYR4
Arsenic
16 µg/L 160%
of the EPA limit, at the 95th percentile of samples — 10 µg/L
Highest in the city: TURNBULL · 148 people · 2019
8/18 SYR4
Bromodichloromethane
14.5 µg/L
No EPA limit set
Main supplier: WARRENTON, TOWN OF · 11,801 people · 2019
16/18 SYR4
Xylenes, Total
11.375 µg/L 0.1%
of the EPA limit 10000 µg/L
Highest in the city: WHITEWOOD FOREST · 70 people · 2019
7/18 SYR4
Selenium
11 µg/L 22%
of the EPA limit 50 µg/L
Highest in the city: BEALETON REGIONAL · 4,250 people · 2019
1/18 SYR4
Combined Radium (-226 And -228)
3.54 pCi/L 71%
of the EPA limit 5 pCi/L
Main supplier: WARRENTON, TOWN OF · 11,801 people · 2019
Highest in the city: 7.225 pCi/L — MARSHALL WATERWORKS · 2,363 people · 2019
18/18 SYR4
Dibromochloromethane
2.575 µg/L
No EPA limit set
Main supplier: WARRENTON, TOWN OF · 11,801 people · 2019
Highest in the city: 6.1 µg/L — MARSHALL WATERWORKS · 2,363 people · 2019
15/18 SYR4
Trichloroethylene
5.9 µg/L 118%
of the EPA limit, at the 95th percentile of samples — 5 µg/L
Highest in the city: MARSHALL WATERWORKS · 2,363 people · 2019
1/18 SYR4
Bromoform
0.5000 µg/L
No EPA limit set
Main supplier: WARRENTON, TOWN OF · 11,801 people · 2019
Highest in the city: 5.85 µg/L — MARSHALL WATERWORKS · 2,363 people · 2019
11/18 SYR4
Monochloroacetic Acid
2.81 µg/L
No EPA limit set
Main supplier: WARRENTON, TOWN OF · 11,801 people · 2019
1/18 SYR4
Combined Uranium
2.63 µg/L 8.8%
of the EPA limit 30 µg/L
Highest in the city: MEADOWS, THE · 733 people · 2018
2/18 SYR4
Tetrachloroethylene
2.26 µg/L 45%
of the EPA limit 5 µg/L
Highest in the city: MARSHALL WATERWORKS · 2,363 people · 2019
1/18 SYR4
Ethylbenzene
2.175 µg/L 0.3%
of the EPA limit 700 µg/L
Highest in the city: WHITEWOOD FOREST · 70 people · 2019
5/18 SYR4
Toluene
2.1 µg/L 0.2%
of the EPA limit 1000 µg/L
Highest in the city: NEW BALTIMORE REGIONAL · 8,818 people · 2019
1/18 SYR4
Dibromoacetic Acid
2.02 µg/L
No EPA limit set
Highest in the city: NEW BALTIMORE REGIONAL · 8,818 people · 2019
5/18 SYR4
Vinyl Chloride
1.1 µg/L 55%
of the EPA limit 2 µg/L
Highest in the city: MARSHALL WATERWORKS · 2,363 people · 2019
1/18 SYR4
trans-1,2-Dichloroethylene
0.7800 µg/L 0.8%
of the EPA limit 100 µg/L
Highest in the city: MARSHALL WATERWORKS · 2,363 people · 2019
1/18 SYR4
cis-1,2-Dichloroethylene
0.7000 µg/L 1%
of the EPA limit 70 µg/L
Highest in the city: MARSHALL WATERWORKS · 2,363 people · 2019
1/18 SYR4
Heptachlor Epoxide
0.1800 µg/L 90%
of the EPA limit 0.2000 µg/L
Highest in the city: NEW BALTIMORE REGIONAL · 8,818 people · 2015
1/18 SYR4
PFOA
0.0046 µg/L
No EPA limit set
Main supplier: WARRENTON, TOWN OF · 11,801 people · 2025
Highest in the city: 0.0446 µg/L — BEALETON REGIONAL · 4,250 people · 2025
3/18 UCMR-5
PFOS
0.0311 µg/L
No EPA limit set
Highest in the city: BEALETON REGIONAL · 4,250 people · 2025
2/18 UCMR-5
PFBS
0.0188 µg/L
No EPA limit set
Highest in the city: BEALETON REGIONAL · 4,250 people · 2025
3/18 UCMR-5
Pfhxa
0.0178 µg/L
No EPA limit set
Highest in the city: BEALETON REGIONAL · 4,250 people · 2025
2/18 UCMR-5
Pfpea
0.0033 µg/L
No EPA limit set
Main supplier: WARRENTON, TOWN OF · 11,801 people · 2025
Highest in the city: 0.0169 µg/L — BEALETON REGIONAL · 4,250 people · 2025
4/18 UCMR-5
Pfhpa
0.0154 µg/L
No EPA limit set
Highest in the city: BEALETON REGIONAL · 4,250 people · 2025
1/18 UCMR-5
Pfba
0.0097 µg/L
No EPA limit set
Highest in the city: BEALETON REGIONAL · 4,250 people · 2025
1/18 UCMR-5
Lead
0.0 mg/L 0%
of the EPA limit 0.0150 mg/L
Main supplier: WARRENTON, TOWN OF · 11,801 people · 2024
Highest in the city: 0.0078 mg/L — WATERLOO ESTATES · 213 people · 2023
18/18 LCR
PFHXS
0.0075 µg/L
No EPA limit set
Highest in the city: BEALETON REGIONAL · 4,250 people · 2025
2/18 UCMR-5
PFNA
0.0050 µg/L
No EPA limit set
Highest in the city: BEALETON REGIONAL · 4,250 people · 2025
1/18 UCMR-5
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 Warrenton

SupplierPopulation served
WARRENTON, TOWN OF 11,801
NEW BALTIMORE REGIONAL 8,818
BEALETON REGIONAL 4,250
MARSHALL WATERWORKS 2,363
MEADOWS, THE 733
OPAL REGIONAL 643
PLAINS, THE 566
BETHEL ACADEMY SUBDIVISION 346
GREEN MEADOWS SUBDIVISION 340
WATERLOO ESTATES 213
CATLETT SUBDIVISION 200
FAUQUIER SPRINGS 160
TURNBULL 148
PARIS 100
AUBURN CROSSING 87
WHITEWOOD FOREST 70
BOTHA SUBDIVISION 46
BALDWIN RIDGE 25

Frequently asked questions about Warrenton tap water

Is Warrenton tap water safe to drink?

EPA testing detected 42 contaminants in the water serving Warrenton. 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 Warrenton?

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

What contaminants are in Warrenton's water?

The contaminants EPA monitoring detected in Warrenton 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.