What was found in ZIP 20146
The highest level seen across the suppliers serving this ZIP, the EPA limit for each, and where the figure comes from.
| Contaminant | Level vs EPA limit | Suppliers | Source |
|---|---|---|---|
| Nitrate-Nitrite | 1900 µg/L 19% of the EPA limit 10000 µg/L | 1/1 | SYR4 |
| Fluoride | 700 µg/L 18% of the EPA limit 4000 µg/L | 1/1 | SYR4 |
| Copper | 522 µg/L 40% of the EPA limit 1300 µg/L | 1/1 | SYR4 |
| Nitrate | 450 µg/L 4.5% of the EPA limit 10000 µg/L | 1/1 | SYR4 |
| TTHM | 102 µg/L 127% of the EPA limit, in the worst sample — 80 µg/L | 1/1 | SYR4 |
| Total Haloacetic Acids (HAA5) | 93.8 µg/L 156% of the EPA limit, in the worst sample — 60 µg/L | 1/1 | SYR4 |
| Chloroform | 92.1 µg/L No EPA limit set | 1/1 | SYR4 |
| Trichloroacetic Acid | 46.2 µg/L No EPA limit set | 1/1 | SYR4 |
| Dichloroacetic Acid | 43.3 µg/L No EPA limit set | 1/1 | SYR4 |
| Barium | 41 µg/L 2.1% of the EPA limit 2000 µg/L | 1/1 | SYR4 |
| Lead | 20 µg/L 133% of the EPA limit, in the worst sample — 15 µg/L | 1/1 | SYR4 |
| Bromodichloromethane | 13.9 µg/L No EPA limit set | 1/1 | SYR4 |
| Dibromochloromethane | 10.7 µg/L No EPA limit set | 1/1 | SYR4 |
| Monochloroacetic Acid | 5.42 µg/L No EPA limit set | 1/1 | SYR4 |
| Gross Beta Particle Activity | 5.4 pCi/L No EPA limit set | 1/1 | SYR4 |
| Gross Alpha, Excl. Radon And U | 3.7 pCi/L 25% of the EPA limit 15 pCi/L | 1/1 | SYR4 |
| Dibromoacetic Acid | 3.33 µg/L No EPA limit set | 1/1 | SYR4 |
| Bromoform | 2.27 µg/L No EPA limit set | 1/1 | SYR4 |
| Combined Radium (-226 And -228) | 1.08 pCi/L 22% of the EPA limit 5 pCi/L | 1/1 | SYR4 |
| Atrazine | 0.3500 µg/L 12% of the EPA limit 3 µg/L | 1/1 | SYR4 |
| Simazine | 0.0800 µg/L 2% of the EPA limit 4 µg/L | 1/1 | SYR4 |
| Pfpea | 0.0034 µg/L No EPA limit set | 1/1 | UCMR-5 |
| Lead | 0.00050 mg/L 3.3% of the EPA limit 0.0150 mg/L | 1/1 | 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 single worst sample on
record — over 100% is worth reading, but is not by itself a violation.
Formal violations are listed separately.
Water suppliers serving ZIP 20146
| Supplier | State | Population served |
|---|---|---|
| LOUDOUN WATER - CENTRAL SYSTEM | VA | 334,808 |
Frequently asked questions about ZIP 20146 tap water
Is the tap water in ZIP 20146 safe to drink?
EPA testing detected 23 contaminants across the water suppliers serving ZIP 20146. A detection isn't the same as a violation — most levels are within federal limits. See each level and source above, and your utility's annual Consumer Confidence Report for the official status.
Which water suppliers serve ZIP 20146?
1 public water supplier report EPA drinking-water monitoring for ZIP 20146. Each is listed above with its population served.
What contaminants are in ZIP 20146's water?
EPA monitoring detected Nitrate-Nitrite, Fluoride, Copper, Nitrate, TTHM, and others across this ZIP's suppliers. The full list with levels and sources is above.