What was found in Harpers Ferry'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.
| Contaminant | Level vs EPA limit | Suppliers | Source |
|---|---|---|---|
| Nitrate | 5520 µg/L 55% of the EPA limit 10000 µg/L Main supplier: CORPORATION OF HARPERS FERRY · 2,122 people · 2019 | 3/3 | SYR4 |
| Nitrate-Nitrite | 3810 µg/L 38% of the EPA limit 10000 µg/L Main supplier: CORPORATION OF HARPERS FERRY · 2,122 people · 2019 | 3/3 | SYR4 |
| Fluoride | 1447 µg/L 36% of the EPA limit 4000 µg/L Main supplier: CORPORATION OF HARPERS FERRY · 2,122 people · 2019 | 2/3 | SYR4 |
| Copper | 231.1 µg/L 18% of the EPA limit 1300 µg/L Main supplier: CORPORATION OF HARPERS FERRY · 2,122 people · 2019
Highest in the city: 687.5 µg/L — WVAW - THE MOUNTAIN WATER SYSTEM · 976 people · 2019 | 3/3 | SYR4 |
| Barium | 550.8 µg/L 28% of the EPA limit 2000 µg/L Main supplier: CORPORATION OF HARPERS FERRY · 2,122 people · 2019 | 3/3 | SYR4 |
| TTHM | 39.48 µg/L 49% of the EPA limit 80 µg/L Main supplier: CORPORATION OF HARPERS FERRY · 2,122 people · 2019
Highest in the city: 48.52 µg/L — WVAW - THE MOUNTAIN WATER SYSTEM · 976 people · 2019 | 3/3 | SYR4 |
| Total Haloacetic Acids (HAA5) | 44.05 µg/L 73% of the EPA limit 60 µg/L Main supplier: CORPORATION OF HARPERS FERRY · 2,122 people · 2019 | 3/3 | SYR4 |
| Chloroform | 33.98 µg/L No EPA limit set Main supplier: CORPORATION OF HARPERS FERRY · 2,122 people · 2019
Highest in the city: 34.38 µg/L — WVAW - THE MOUNTAIN WATER SYSTEM · 976 people · 2019 | 3/3 | SYR4 |
| Trichloroacetic Acid | 25.44 µg/L No EPA limit set Main supplier: CORPORATION OF HARPERS FERRY · 2,122 people · 2019 | 3/3 | SYR4 |
| Dichloroacetic Acid | 18.925 µg/L No EPA limit set Main supplier: CORPORATION OF HARPERS FERRY · 2,122 people · 2019 | 3/3 | SYR4 |
| Bromodichloromethane | 8.62 µg/L No EPA limit set Main supplier: CORPORATION OF HARPERS FERRY · 2,122 people · 2019
Highest in the city: 11.66 µg/L — WVAW - THE MOUNTAIN WATER SYSTEM · 976 people · 2019 | 3/3 | SYR4 |
| Lead | 3.32 µg/L 22% of the EPA limit 15 µg/L Main supplier: CORPORATION OF HARPERS FERRY · 2,122 people · 2019
Highest in the city: 6.96 µg/L — OAK HILL MOBILE HOME COMMUNITY LLC · 172 people · 2019 | 3/3 | SYR4 |
| Dibromochloromethane | 1.89 µg/L No EPA limit set Main supplier: CORPORATION OF HARPERS FERRY · 2,122 people · 2019
Highest in the city: 6.22 µg/L — WVAW - THE MOUNTAIN WATER SYSTEM · 976 people · 2019 | 3/3 | SYR4 |
| Gross Alpha, Excl. Radon And U | 0.7200 pCi/L 4.8% of the EPA limit 15 pCi/L Main supplier: CORPORATION OF HARPERS FERRY · 2,122 people · 2019
Highest in the city: 4.152 pCi/L — WVAW - THE MOUNTAIN WATER SYSTEM · 976 people · 2019 | 3/3 | SYR4 |
| Combined Radium (-226 And -228) | 3.22 pCi/L 64% of the EPA limit 5 pCi/L Highest in the city: WVAW - THE MOUNTAIN WATER SYSTEM · 976 people · 2013 | 1/3 | SYR4 |
| Selenium | 2.9 µg/L 5.8% of the EPA limit 50 µg/L Highest in the city: OAK HILL MOBILE HOME COMMUNITY LLC · 172 people · 2019 | 2/3 | SYR4 |
| Gross Beta Particle Activity | 2.23 pCi/L No EPA limit set Highest in the city: WVAW - THE MOUNTAIN WATER SYSTEM · 976 people · 2019 | 1/3 | SYR4 |
| Arsenic | 2.075 µg/L 21% of the EPA limit 10 µg/L Highest in the city: OAK HILL MOBILE HOME COMMUNITY LLC · 172 people · 2019 | 2/3 | SYR4 |
| Chromium | 2 µg/L 2% of the EPA limit 100 µg/L Main supplier: CORPORATION OF HARPERS FERRY · 2,122 people · 2019 | 1/3 | SYR4 |
| Dibromoacetic Acid | 1.39 µg/L No EPA limit set Main supplier: CORPORATION OF HARPERS FERRY · 2,122 people · 2019
Highest in the city: 1.946 µg/L — OAK HILL MOBILE HOME COMMUNITY LLC · 172 people · 2019 | 3/3 | SYR4 |
| Bromoform | 1.087 µg/L No EPA limit set Highest in the city: OAK HILL MOBILE HOME COMMUNITY LLC · 172 people · 2019 | 2/3 | SYR4 |
| Di(2-ethylhexyl) Adipate | 0.8180 µg/L 0.2% of the EPA limit 400 µg/L Highest in the city: WVAW - THE MOUNTAIN WATER SYSTEM · 976 people · 2019 | 1/3 | SYR4 |
| Thallium, Total | 0.3000 µg/L 15% of the EPA limit 2 µg/L Highest in the city: OAK HILL MOBILE HOME COMMUNITY LLC · 172 people · 2019 | 1/3 | SYR4 |
| Chlordane | 0.0226 µg/L 1.1% of the EPA limit 2 µg/L Highest in the city: WVAW - THE MOUNTAIN WATER SYSTEM · 976 people · 2019 | 1/3 | SYR4 |
| Lead | 0.0029 mg/L 19% of the EPA limit 0.0150 mg/L Main supplier: CORPORATION OF HARPERS FERRY · 2,122 people · 2024 | 3/3 | 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 Harpers Ferry
| Supplier | Population served |
|---|---|
| CORPORATION OF HARPERS FERRY | 2,122 |
| WVAW - THE MOUNTAIN WATER SYSTEM | 976 |
| OAK HILL MOBILE HOME COMMUNITY LLC | 172 |
Frequently asked questions about Harpers Ferry tap water
Is Harpers Ferry tap water safe to drink?
EPA testing detected 25 contaminants in the water serving Harpers Ferry. 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 Harpers Ferry?
3 public water suppliers report drinking-water monitoring for Harpers Ferry, West Virginia to the EPA. Each is listed above with its population served.
What contaminants are in Harpers Ferry's water?
The contaminants EPA monitoring detected in Harpers Ferry include Nitrate, Nitrate-Nitrite, Fluoride, Copper, Barium. 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.