Fauquier County Water Quality: 2 Cities Ranked by the Records
Fauquier County, Virginia: 2 city reports built from EPA and utility records. A county has many suppliers; each city shows the system that serves it.
Highest result for each contaminant
One row per contaminant: the highest result any system in the county reported, against its limit. Open a row for the systems behind it.
LithiumDetected in 1 system of 2 tested10 µg/L EPA health reference level (screening, not a legal limit) · US EPAHighest34.8 µg/L
- NEW BALTIMORE REGIONAL34.8 µg/LSample date: 2023-06-13 to 2023-12-26
- WARRENTON, TOWN OFNot detected · below 9.0 µg/L lab reporting limitSample date: 2024-10-21 to 2025-07-23
Perfluorooctanesulfonic acid (PFOS)Detected in 1 system of 2 tested4.0 ng/L federal MCL (2024) · US EPAHighest12 ng/L
- NEW BALTIMORE REGIONAL12 ng/LSample date: 2023-06-20 to 2023-12-26
- WARRENTON, TOWN OFNot detected · below 4.0 ng/L lab reporting limitSample date: 2024-10-21 to 2025-07-23
Perfluorooctanoic acid (PFOA)Detected in 2 systems4.0 ng/L federal MCL (2024) · US EPAHighest4.9 ng/L
- NEW BALTIMORE REGIONAL4.9 ng/LSample date: 2023-06-20 to 2023-12-26
- WARRENTON, TOWN OF4.6 ng/LSample date: 2024-10-21 to 2025-07-23
Perfluorohexanesulfonic acid (PFHxS)Detected in 1 system of 2 tested10 ng/L federal MCL (2024) · US EPAHighest6.2 ng/L
- NEW BALTIMORE REGIONAL6.2 ng/LSample date: 2023-06-20 to 2023-12-26
- WARRENTON, TOWN OFNot detected · below 3.0 ng/L lab reporting limitSample date: 2024-10-21 to 2025-07-23
Lead (90th percentile)Detected in 1 system of 2 tested15 µg/L federal action level · US EPAHighest2.73 µg/L
- NEW BALTIMORE REGIONAL2.73 µg/LMonitoring period: 2022–2024
- WARRENTON, TOWN OFNot detectedMonitoring period: 2022–2024
Perfluorobutanesulfonic acid (PFBS)Detected in 1 system of 2 tested2,000 ng/L EPA health advisory (screening, not a legal limit) · US EPAHighest5.6 ng/L
- NEW BALTIMORE REGIONAL5.6 ng/LSample date: 2023-06-20 to 2023-12-26
- WARRENTON, TOWN OFNot detected · below 3.0 ng/L lab reporting limitSample date: 2024-10-21 to 2025-07-23
Perfluorohexanoic acid (PFHxA)Detected in 1 system of 2 tested400,000 ng/L Michigan EGLE state MCL (strictest US state) · Michigan EGLEHighest8.2 ng/L
- NEW BALTIMORE REGIONAL8.2 ng/LSample date: 2023-06-20 to 2023-12-26
- WARRENTON, TOWN OFNot detected · below 3.0 ng/L lab reporting limitSample date: 2024-10-21 to 2025-07-23
Perfluoropentanoic acid (PFPeA)Detected in 2 systemsNo federal or state limit; shown for transparencyHighest11 ng/L
- NEW BALTIMORE REGIONAL11 ng/LSample date: 2023-06-20 to 2023-12-26
- WARRENTON, TOWN OF3.3 ng/LSample date: 2024-10-21 to 2025-07-23
23 PFAS tested, none detected in any systemShow
Tested in these 2 systems: NEW BALTIMORE REGIONAL, WARRENTON, TOWN OF
- 11-Chloroeicosafluoro-3-oxaundecane-1-sulfonic acid (11Cl-PF3OUdS)
- 1H, 1H, 2H, 2H-perfluorodecane sulfonic acid (8:2 FTS)
- 1H, 1H, 2H, 2H-perfluorohexane sulfonic acid (4:2 FTS)
- 1H, 1H, 2H, 2H-perfluorooctane sulfonic acid (6:2 FTS)
- 4,8-Dioxa-3H-perfluorononanoic acid (ADONA)
- 9-Chlorohexadecafluoro-3-oxanone-1-sulfonic acid (9Cl-PF3ONS)
- Hexafluoropropylene oxide dimer acid (HFPO-DA) (GenX chemicals)
- N-ethyl perfluorooctanesulfonamidoacetic acid (NEtFOSAA)
- N-methyl perfluorooctanesulfonamidoacetic acid (NMeFOSAA)
- Nonafluoro-3,6-dioxaheptanoic acid (NFDHA)
- Perfluoro (2-ethoxyethane) sulfonic acid (PFEESA)
- Perfluoro-3-methoxypropanoic acid (PFMPA)
- Perfluoro-4-methoxybutanoic acid (PFMBA)
- Perfluorobutanoic acid (PFBA)
- Perfluorodecanoic acid (PFDA)
- Perfluorododecanoic acid (PFDoA)
- Perfluoroheptanesulfonic acid (PFHpS)
- Perfluoroheptanoic acid (PFHpA)
- Perfluorononanoic acid (PFNA)
- Perfluoropentanesulfonic acid (PFPeS)
- Perfluorotetradecanoic acid (PFTA)
- Perfluorotridecanoic acid (PFTrDA)
- Perfluoroundecanoic acid (PFUnA)
Cities ranked by the records
Ranked by the Purity Score of each city's main water system, highest first. Scores belong to water systems; there is no county score. The score is computed only from contaminants measured in the published EPA record, so this ranks the record, not which city's water is safest. How the score works.
0of 2 cities above the 15 µg/L action level
Based on each system's 90th-percentile result. Lead from household plumbing isn't in this record.
Lead in VirginiaLargest water systems
- WarrentonWARRENTON, TOWN OF · VA606160011,801 served
- New BaltimoreNEW BALTIMORE REGIONAL · VA60613188,818 served
Frequently asked
How does Fauquier County tap water compare across cities?
PurityMap ranks 2 cities in Fauquier County by the Purity Score of each city's main water system, computed only from contaminants measured in the published EPA record. Scores belong to water systems, not to cities. The highest published score is Warrenton's main water system: WARRENTON, TOWN OF · PWSID VA6061600 · Purity Score 76 (Good) · Confidence: moderate · Assessed at the water-system level. The ranking compares the records, not which city's water is safest, and your own tap can differ with household plumbing.
How many Fauquier County cities had a PFAS sample above a 2024 EPA limit?
2 of 2 Fauquier County city reports had a PFAS sample above a 2024 EPA limit in EPA's UCMR 5 testing, including New Baltimore (PFOS 12 ng/L), Warrenton (PFOA 4.6 ng/L). That limit is judged on a yearly average, and water systems have until 2029 to meet it, so a single sample is not a violation. PFAS were detected at any level in 2.
Is there lead in Fauquier County tap water?
Utilities report lead as a 90th-percentile result from home taps. 1 of 2 Fauquier County cities reported a value above zero, and none was above the 15 µg/L federal action level. Lead usually comes from a building's own pipes and fixtures, so only a test at your tap tells you what you drink.
Have Fauquier County water systems had drinking-water violations?
1 city in Fauquier County has a health-based violation in the federal SDWIS record within about the last ten years. Each city report lists the contaminant, year and whether it was resolved.
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