Is Round Hill, Town of Tap Water Safe? Quality Report

Water source: Ground water
Ownership: Local government
Counties served: Loudoun

Compliance record

Formal violations the EPA has on file for this supplier. A health-based violation means a contaminant limit or a required treatment was breached; the rest are monitoring or reporting failures — still violations, but not a measured health risk.

health-based violations

violations on file

still open

Violation	Type	Status	Period
MCL	Health-based	Resolved	2005-11-01 → 2005-11-30
MCL	Health-based	Resolved	2005-11-01 → 2005-11-30
MCL	Health-based	Resolved	2005-11-01 → 2005-11-30
MCL	Health-based	Resolved	2002-09-01 → 2002-09-30
MCL	Health-based	Resolved	2002-09-01 → 2002-09-30
MCL	Health-based	Resolved	2002-09-01 → 2002-09-30
MCL	Health-based	Resolved	2002-09-01 → 2002-09-30
MCL	Health-based	Resolved	2002-07-01 → 2002-07-31
MCL	Health-based	Resolved	2002-07-01 → 2002-07-31
MCL	Health-based	Resolved	2002-07-01 → 2002-07-31

PFAS detected

PFAS are industrial “forever chemicals”. These are the EPA's latest nationwide test results (2023–2025).

Contaminant	Max	Detection rate	Period
PFBS	0.0083 µg/L	6/8	2025
Pfpea	0.0049 µg/L	6/8	2025
PFOS	0.0088 µg/L	4/8	2025
Pfhxa	0.0042 µg/L	3/8	2025
PFOA	0.0056 µg/L	3/8	2025

Other contaminants detected

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 this system's samples — over 100% is worth reading, but is not by itself a violation. Where a single sample came in higher than that percentile, it is noted under the bar. Formal violations are listed separately.

Contaminant	Level vs EPA limit	Detection rate	Source	Period
Copper	432.45 µg/L 33% of the EPA limit 1300 µg/L worst single sample: 939 µg/L	172/201	SYR4	2012–2019
Nitrate-Nitrite	3042.5 µg/L 30% of the EPA limit 10000 µg/L worst single sample: 3430 µg/L	116/140	SYR4	2012–2019
Lead	11.765 µg/L 78% of the EPA limit 15 µg/L worst single sample: 104 µg/L	43/201	SYR4	2012–2019
Dibromochloromethane	3.175 µg/L No EPA limit set worst single sample: 3.8 µg/L	26/61	SYR4	2012–2019
Chloroform	18.8 µg/L No EPA limit set worst single sample: 20 µg/L	24/61	SYR4	2012–2019
Fluoride	1412 µg/L 35% of the EPA limit 4000 µg/L worst single sample: 1540 µg/L	24/27	SYR4	2012–2019
Gross Beta Particle Activity	6.27 pCi/L No EPA limit set worst single sample: 9.1 pCi/L	22/22	SYR4	2012–2019
Bromodichloromethane	4.815 µg/L No EPA limit set worst single sample: 5.1 µg/L	20/61	SYR4	2012–2019
Lead	0.0034 mg/L 23% of the EPA limit 0.0150 mg/L	19/19	LCR	2024
Combined Radium (-226 And -228)	2.72 pCi/L 54% of the EPA limit 5 pCi/L worst single sample: 3.6 pCi/L	17/18	SYR4	2012–2019
Bromoform	1.8 µg/L No EPA limit set	11/61	SYR4	2012–2019
TTHM	26.5 µg/L 33% of the EPA limit 80 µg/L worst single sample: 28 µg/L	11/11	SYR4	2012–2019
Total Haloacetic Acids (HAA5)	21.3 µg/L 36% of the EPA limit 60 µg/L worst single sample: 24 µg/L	10/11	SYR4	2012–2019
Dichloroacetic Acid	12.4 µg/L No EPA limit set worst single sample: 14 µg/L	9/11	SYR4	2012–2019
Trichloroacetic Acid	7.56 µg/L No EPA limit set worst single sample: 8.6 µg/L	9/11	SYR4	2012–2019
Dibromoacetic Acid	1.575 µg/L No EPA limit set worst single sample: 1.6 µg/L	6/11	SYR4	2012–2019
Lithium	14.5 µg/L No EPA limit set	5/8	UCMR-5	2025
1,2-Dichloroethane	0.9850 µg/L 20% of the EPA limit 5 µg/L worst single sample: 1 µg/L	2/73	SYR4	2012–2019
Barium	11 µg/L 0.5% of the EPA limit 2000 µg/L	1/26	SYR4	2012–2019
Monochloroacetic Acid	1.4 µg/L No EPA limit set	1/11	SYR4	2012–2019

81 contaminants tested, none detected

1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2,4-Trichlorobenzene1,2-DIBROMO-3-CHLOROPROPANE1,2-Dichloropropane11Cl-PF3OUdS2,4,5-TP2,4-D4:2 Fts6:2 Fts8:2 Fts9Cl-PF3ONSAdonaAntimony, TotalArsenicAtrazineBhc-GammaBenzeneBenzo(A)PyreneBeryllium, TotalChlorobenzeneCyanideCadmiumCarbofuranCarbon TetrachlorideChlordaneChromiumDichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDinosebDiquatEthylene DibromideEndrinEthylbenzeneHexachlorobenzeneHfpo-DaHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorMonobromoacetic AcidNetfosaaNfdhaNmefosaaOxamylPfbaPfdaPfdoaPfeesaPfhpaPfhpsPFHXSPfmbaPfmpaPFNAPfpesPftaPftrdaPfunaPentachlorophenolPicloramSeleniumSimazineStyreneTetrachloroethyleneThallium, TotalTolueneTotal Polychlorinated Biphenyls (PCB)ToxapheneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact: MANSFIELD, STEPHEN
Phone: 571-680-4858
Email: [email protected]

Frequently asked questions about Round Hill, Town of

Is Round Hill, Town of tap water safe to drink?

EPA monitoring detected 25 contaminants in Round Hill, Town of's water. A detection isn't the same as a violation — most levels are within federal limits. See each level and source above, and the utility's annual Consumer Confidence Report for its official compliance status.

What contaminants were detected in Round Hill, Town of's water?

EPA monitoring detected Copper, Nitrate-Nitrite, Lead, Dibromochloromethane, Chloroform, and others. The full list with the level and data source for each is above.

How many people does Round Hill, Town of serve?

Round Hill, Town of reports serving 5,055 people in Virginia, per its EPA record.

Has Round Hill, Town of had any water quality violations?

The EPA has 45 violations on file for Round Hill, Town of, of which 22 are health-based (a contaminant limit or required treatment was breached) and 0 remain open. The rest are monitoring or reporting failures.

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.