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Tap water quality report

Round Hill, VA

EPA monitoring detected 25 contaminants across the 2 water suppliers serving Round Hill. 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
5,493
people served
25
contaminants found
Virginia rankings Lead in Virginia PFAS in Virginia

What was found in Round Hill'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
3042.5 µg/L 30%
of the EPA limit 10000 µg/L
Main supplier: ROUND HILL, TOWN OF · 5,055 people · 2019
1/2 SYR4
Fluoride
1412 µg/L 35%
of the EPA limit 4000 µg/L
Main supplier: ROUND HILL, TOWN OF · 5,055 people · 2019
1/2 SYR4
Copper
432.45 µg/L 33%
of the EPA limit 1300 µg/L
Main supplier: ROUND HILL, TOWN OF · 5,055 people · 2019
1/2 SYR4
TTHM
26.5 µg/L 33%
of the EPA limit 80 µg/L
Main supplier: ROUND HILL, TOWN OF · 5,055 people · 2019
1/2 SYR4
Total Haloacetic Acids (HAA5)
21.3 µg/L 36%
of the EPA limit 60 µg/L
Main supplier: ROUND HILL, TOWN OF · 5,055 people · 2019
1/2 SYR4
Chloroform
18.8 µg/L
No EPA limit set
Main supplier: ROUND HILL, TOWN OF · 5,055 people · 2019
1/2 SYR4
Lithium
14.5 µg/L
No EPA limit set
Main supplier: ROUND HILL, TOWN OF · 5,055 people · 2025
1/2 UCMR-5
Dichloroacetic Acid
12.4 µg/L
No EPA limit set
Main supplier: ROUND HILL, TOWN OF · 5,055 people · 2019
1/2 SYR4
Lead
11.765 µg/L 78%
of the EPA limit 15 µg/L
Main supplier: ROUND HILL, TOWN OF · 5,055 people · 2019
1/2 SYR4
Barium
11 µg/L 0.5%
of the EPA limit 2000 µg/L
Main supplier: ROUND HILL, TOWN OF · 5,055 people · 2019
1/2 SYR4
Trichloroacetic Acid
7.56 µg/L
No EPA limit set
Main supplier: ROUND HILL, TOWN OF · 5,055 people · 2019
1/2 SYR4
Gross Beta Particle Activity
6.27 pCi/L
No EPA limit set
Main supplier: ROUND HILL, TOWN OF · 5,055 people · 2019
1/2 SYR4
Bromodichloromethane
4.815 µg/L
No EPA limit set
Main supplier: ROUND HILL, TOWN OF · 5,055 people · 2019
1/2 SYR4
Dibromochloromethane
3.175 µg/L
No EPA limit set
Main supplier: ROUND HILL, TOWN OF · 5,055 people · 2019
1/2 SYR4
Combined Radium (-226 And -228)
2.72 pCi/L 54%
of the EPA limit 5 pCi/L
Main supplier: ROUND HILL, TOWN OF · 5,055 people · 2019
1/2 SYR4
Bromoform
1.8 µg/L
No EPA limit set
Main supplier: ROUND HILL, TOWN OF · 5,055 people · 2019
1/2 SYR4
Dibromoacetic Acid
1.575 µg/L
No EPA limit set
Main supplier: ROUND HILL, TOWN OF · 5,055 people · 2019
1/2 SYR4
Monochloroacetic Acid
1.4 µg/L
No EPA limit set
Main supplier: ROUND HILL, TOWN OF · 5,055 people · 2019
1/2 SYR4
1,2-Dichloroethane
0.9850 µg/L 20%
of the EPA limit 5 µg/L
Main supplier: ROUND HILL, TOWN OF · 5,055 people · 2019
1/2 SYR4
Lead
0.0034 mg/L 23%
of the EPA limit 0.0150 mg/L
Main supplier: ROUND HILL, TOWN OF · 5,055 people · 2024
Highest in the city: 0.0092 mg/L — STONELEIGH · 438 people · 2024
2/2 LCR
PFOS
0.0088 µg/L
No EPA limit set
Main supplier: ROUND HILL, TOWN OF · 5,055 people · 2025
1/2 UCMR-5
PFBS
0.0083 µg/L
No EPA limit set
Main supplier: ROUND HILL, TOWN OF · 5,055 people · 2025
1/2 UCMR-5
PFOA
0.0056 µg/L
No EPA limit set
Main supplier: ROUND HILL, TOWN OF · 5,055 people · 2025
1/2 UCMR-5
Pfpea
0.0049 µg/L
No EPA limit set
Main supplier: ROUND HILL, TOWN OF · 5,055 people · 2025
1/2 UCMR-5
Pfhxa
0.0042 µg/L
No EPA limit set
Main supplier: ROUND HILL, TOWN OF · 5,055 people · 2025
1/2 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 Round Hill

SupplierPopulation served
ROUND HILL, TOWN OF 5,055
STONELEIGH 438

Frequently asked questions about Round Hill tap water

Is Round Hill tap water safe to drink?

EPA testing detected 25 contaminants in the water serving Round Hill. 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 Round Hill?

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

What contaminants are in Round Hill's water?

The contaminants EPA monitoring detected in Round Hill include Nitrate-Nitrite, Fluoride, Copper, TTHM, Total Haloacetic Acids (HAA5). 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.