What was found in ZIP 22124
The level at this ZIP's main supplier, the highest level anywhere in it, the EPA limit for each, and where the figure comes from.
| Contaminant | Level vs EPA limit | Suppliers | Source |
|---|---|---|---|
| Nitrate-Nitrite | 1614 µg/L 16% of the EPA limit 10000 µg/L Main supplier: FAIRFAX COUNTY WATER AUTHORITY · 1,121,613 people · 2019 | 1/1 | SYR4 |
| Nitrate | 1610 µg/L 16% of the EPA limit 10000 µg/L Main supplier: FAIRFAX COUNTY WATER AUTHORITY · 1,121,613 people · 2019 | 1/1 | SYR4 |
| Fluoride | 800 µg/L 20% of the EPA limit 4000 µg/L Main supplier: FAIRFAX COUNTY WATER AUTHORITY · 1,121,613 people · 2019 | 1/1 | SYR4 |
| Copper | 190 µg/L 15% of the EPA limit 1300 µg/L Main supplier: FAIRFAX COUNTY WATER AUTHORITY · 1,121,613 people · 2019 | 1/1 | SYR4 |
| TTHM | 63.305 µg/L 79% of the EPA limit 80 µg/L Main supplier: FAIRFAX COUNTY WATER AUTHORITY · 1,121,613 people · 2019 | 1/1 | SYR4 |
| Barium | 48.16 µg/L 2.4% of the EPA limit 2000 µg/L Main supplier: FAIRFAX COUNTY WATER AUTHORITY · 1,121,613 people · 2019 | 1/1 | SYR4 |
| Chloroform | 47.57 µg/L No EPA limit set Main supplier: FAIRFAX COUNTY WATER AUTHORITY · 1,121,613 people · 2019 | 1/1 | SYR4 |
| Total Haloacetic Acids (HAA5) | 40.7 µg/L 68% of the EPA limit 60 µg/L Main supplier: FAIRFAX COUNTY WATER AUTHORITY · 1,121,613 people · 2019 | 1/1 | SYR4 |
| Dichloroacetic Acid | 22.115 µg/L No EPA limit set Main supplier: FAIRFAX COUNTY WATER AUTHORITY · 1,121,613 people · 2019 | 1/1 | SYR4 |
| Nitrite | 20 µg/L 2% of the EPA limit 1000 µg/L Main supplier: FAIRFAX COUNTY WATER AUTHORITY · 1,121,613 people · 2019 | 1/1 | SYR4 |
| Trichloroacetic Acid | 17.5 µg/L No EPA limit set Main supplier: FAIRFAX COUNTY WATER AUTHORITY · 1,121,613 people · 2019 | 1/1 | SYR4 |
| Bromodichloromethane | 12.7 µg/L No EPA limit set Main supplier: FAIRFAX COUNTY WATER AUTHORITY · 1,121,613 people · 2019 | 1/1 | SYR4 |
| Bromate | 8.9 µg/L 89% of the EPA limit 10 µg/L Main supplier: FAIRFAX COUNTY WATER AUTHORITY · 1,121,613 people · 2019 | 1/1 | SYR4 |
| Dibromochloromethane | 6.6695 µg/L No EPA limit set Main supplier: FAIRFAX COUNTY WATER AUTHORITY · 1,121,613 people · 2019 | 1/1 | SYR4 |
| Gross Beta Particle Activity | 5.55 pCi/L No EPA limit set Main supplier: FAIRFAX COUNTY WATER AUTHORITY · 1,121,613 people · 2019 | 1/1 | SYR4 |
| Monochloroacetic Acid | 3.737 µg/L No EPA limit set Main supplier: FAIRFAX COUNTY WATER AUTHORITY · 1,121,613 people · 2019 | 1/1 | SYR4 |
| Gross Alpha, Excl. Radon And U | 3.01 pCi/L 20% of the EPA limit 15 pCi/L Main supplier: FAIRFAX COUNTY WATER AUTHORITY · 1,121,613 people · 2019 | 1/1 | SYR4 |
| Dibromoacetic Acid | 2.329 µg/L No EPA limit set Main supplier: FAIRFAX COUNTY WATER AUTHORITY · 1,121,613 people · 2019 | 1/1 | SYR4 |
| Bromoform | 1.41 µg/L No EPA limit set Main supplier: FAIRFAX COUNTY WATER AUTHORITY · 1,121,613 people · 2019 | 1/1 | SYR4 |
| Lead | 1.09 µg/L 7.3% of the EPA limit 15 µg/L Main supplier: FAIRFAX COUNTY WATER AUTHORITY · 1,121,613 people · 2019 | 1/1 | SYR4 |
| Combined Radium (-226 And -228) | 0.6501 pCi/L 13% of the EPA limit 5 pCi/L Main supplier: FAIRFAX COUNTY WATER AUTHORITY · 1,121,613 people · 2019 | 1/1 | SYR4 |
| Combined Uranium | 0.1120 µg/L 0.4% of the EPA limit 30 µg/L Main supplier: FAIRFAX COUNTY WATER AUTHORITY · 1,121,613 people · 2019 | 1/1 | SYR4 |
| Atrazine | 0.0875 µg/L 2.9% of the EPA limit 3 µg/L Main supplier: FAIRFAX COUNTY WATER AUTHORITY · 1,121,613 people · 2017 | 1/1 | SYR4 |
| Pfpea | 0.0215 µg/L No EPA limit set Main supplier: FAIRFAX COUNTY WATER AUTHORITY · 1,121,613 people · 2025 | 1/1 | UCMR-5 |
| Pfba | 0.0176 µg/L No EPA limit set Main supplier: FAIRFAX COUNTY WATER AUTHORITY · 1,121,613 people · 2025 | 1/1 | UCMR-5 |
| Pfhxa | 0.0171 µg/L No EPA limit set Main supplier: FAIRFAX COUNTY WATER AUTHORITY · 1,121,613 people · 2025 | 1/1 | UCMR-5 |
| 6:2 Fts | 0.0101 µg/L No EPA limit set Main supplier: FAIRFAX COUNTY WATER AUTHORITY · 1,121,613 people · 2025 | 1/1 | UCMR-5 |
| PFBS | 0.0081 µg/L No EPA limit set Main supplier: FAIRFAX COUNTY WATER AUTHORITY · 1,121,613 people · 2025 | 1/1 | UCMR-5 |
| PFOA | 0.0074 µg/L No EPA limit set Main supplier: FAIRFAX COUNTY WATER AUTHORITY · 1,121,613 people · 2025 | 1/1 | UCMR-5 |
| PFOS | 0.0057 µg/L No EPA limit set Main supplier: FAIRFAX COUNTY WATER AUTHORITY · 1,121,613 people · 2025 | 1/1 | UCMR-5 |
| Pfhpa | 0.0056 µg/L No EPA limit set Main supplier: FAIRFAX COUNTY WATER AUTHORITY · 1,121,613 people · 2025 | 1/1 | UCMR-5 |
| Lead | 0.0012 mg/L 8% of the EPA limit 0.0150 mg/L Main supplier: FAIRFAX COUNTY WATER AUTHORITY · 1,121,613 people · 2023 | 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 95th percentile of the
system's samples — over 100% is worth reading, but is not by itself a
violation.
Formal violations are listed separately.
Water suppliers serving ZIP 22124
| Supplier | State | Population served |
|---|---|---|
| FAIRFAX COUNTY WATER AUTHORITY | VA | 1,121,613 |
Frequently asked questions about ZIP 22124 tap water
Is the tap water in ZIP 22124 safe to drink?
EPA testing detected 32 contaminants across the water suppliers serving ZIP 22124. 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 22124?
1 public water supplier report EPA drinking-water monitoring for ZIP 22124. Each is listed above with its population served.
What contaminants are in ZIP 22124's water?
EPA monitoring detected Nitrate-Nitrite, Nitrate, Fluoride, Copper, TTHM, and others across this ZIP's suppliers. The full list with levels and sources is above.