What was found in ZIP 19904
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 | 5190 µg/L 52% of the EPA limit 10000 µg/L Main supplier: DOVER WATER DEPARTMENT · 39,491 people · 2019
Highest in the ZIP: 7708.18 µg/L — GARRISON LAKE PUMP DISTRICT · 17,148 people · 2019 | 2/3 | SYR4 |
| Nitrate | 5255 µg/L 53% of the EPA limit 10000 µg/L Main supplier: DOVER WATER DEPARTMENT · 39,491 people · 2019
Highest in the ZIP: 7704.09 µg/L — GARRISON LAKE PUMP DISTRICT · 17,148 people · 2019 | 2/3 | SYR4 |
| Fluoride | 1070 µg/L 27% of the EPA limit 4000 µg/L Main supplier: DOVER WATER DEPARTMENT · 39,491 people · 2019 | 3/3 | SYR4 |
| Nitrite | 200 µg/L 20% of the EPA limit 1000 µg/L Main supplier: DOVER WATER DEPARTMENT · 39,491 people · 2019 | 1/3 | SYR4 |
| Copper | 179.2 µg/L 14% of the EPA limit 1300 µg/L Main supplier: DOVER WATER DEPARTMENT · 39,491 people · 2019 | 3/3 | SYR4 |
| Barium | 67.709 µg/L 3.4% of the EPA limit 2000 µg/L Main supplier: DOVER WATER DEPARTMENT · 39,491 people · 2019
Highest in the ZIP: 110.3 µg/L — GARRISON LAKE PUMP DISTRICT · 17,148 people · 2019 | 2/3 | SYR4 |
| Cyanide | 78 µg/L 39% of the EPA limit 200 µg/L Highest in the ZIP: CAMDEN PUMP DISTRICT · 17,208 people · 2019 | 1/3 | SYR4 |
| TTHM | 48.35 µg/L 60% of the EPA limit 80 µg/L Main supplier: DOVER WATER DEPARTMENT · 39,491 people · 2019 | 3/3 | SYR4 |
| Lithium | 37.2 µg/L No EPA limit set Main supplier: DOVER WATER DEPARTMENT · 39,491 people · 2025 | 3/3 | UCMR-5 |
| Chloroform | 32.235 µg/L No EPA limit set Main supplier: DOVER WATER DEPARTMENT · 39,491 people · 2019 | 3/3 | SYR4 |
| Total Haloacetic Acids (HAA5) | 14.815 µg/L 25% of the EPA limit 60 µg/L Main supplier: DOVER WATER DEPARTMENT · 39,491 people · 2019
Highest in the ZIP: 19.4065 µg/L — CAMDEN PUMP DISTRICT · 17,208 people · 2019 | 3/3 | SYR4 |
| Lead | 7.7 µg/L 51% of the EPA limit 15 µg/L Main supplier: DOVER WATER DEPARTMENT · 39,491 people · 2019
Highest in the ZIP: 10.18 µg/L — CAMDEN PUMP DISTRICT · 17,208 people · 2018 | 3/3 | SYR4 |
| Chromium | 10 µg/L 10% of the EPA limit 100 µg/L Main supplier: DOVER WATER DEPARTMENT · 39,491 people · 2019 | 3/3 | SYR4 |
| Trichloroacetic Acid | 9.9145 µg/L No EPA limit set Main supplier: DOVER WATER DEPARTMENT · 39,491 people · 2019
Highest in the ZIP: 9.98725 µg/L — CAMDEN PUMP DISTRICT · 17,208 people · 2019 | 3/3 | SYR4 |
| Bromodichloromethane | 9.69 µg/L No EPA limit set Main supplier: DOVER WATER DEPARTMENT · 39,491 people · 2019 | 3/3 | SYR4 |
| Dichloroacetic Acid | 6.339 µg/L No EPA limit set Main supplier: DOVER WATER DEPARTMENT · 39,491 people · 2019
Highest in the ZIP: 8.685 µg/L — CAMDEN PUMP DISTRICT · 17,208 people · 2019 | 3/3 | SYR4 |
| Xylenes, Total | 3.105 µg/L 0% of the EPA limit 10000 µg/L Main supplier: DOVER WATER DEPARTMENT · 39,491 people · 2019
Highest in the ZIP: 6.178 µg/L — GARRISON LAKE PUMP DISTRICT · 17,148 people · 2019 | 2/3 | SYR4 |
| Bromate | 6 µg/L 60% of the EPA limit 10 µg/L Main supplier: DOVER WATER DEPARTMENT · 39,491 people · 2019 | 1/3 | SYR4 |
| Dibromochloromethane | 5.325 µg/L No EPA limit set Main supplier: DOVER WATER DEPARTMENT · 39,491 people · 2019 | 3/3 | SYR4 |
| Tetrachloroethylene | 5.21 µg/L 104% of the EPA limit, at the 95th percentile of samples — 5 µg/L Main supplier: DOVER WATER DEPARTMENT · 39,491 people · 2019 | 1/3 | SYR4 |
| Arsenic | 3.783 µg/L 38% of the EPA limit 10 µg/L Main supplier: DOVER WATER DEPARTMENT · 39,491 people · 2019 | 1/3 | SYR4 |
| Bromoform | 2.4575 µg/L No EPA limit set Main supplier: DOVER WATER DEPARTMENT · 39,491 people · 2019 | 2/3 | SYR4 |
| Dibromoacetic Acid | 2.4465 µg/L No EPA limit set Main supplier: DOVER WATER DEPARTMENT · 39,491 people · 2019 | 2/3 | SYR4 |
| Combined Radium (-226 And -228) | 2.058 pCi/L 41% of the EPA limit 5 pCi/L Main supplier: DOVER WATER DEPARTMENT · 39,491 people · 2019 | 3/3 | SYR4 |
| Selenium | 1.182 µg/L 2.4% of the EPA limit 50 µg/L Main supplier: DOVER WATER DEPARTMENT · 39,491 people · 2019
Highest in the ZIP: 1.55 µg/L — GARRISON LAKE PUMP DISTRICT · 17,148 people · 2019 | 2/3 | SYR4 |
| Monochloroacetic Acid | 1.4753 µg/L No EPA limit set Highest in the ZIP: CAMDEN PUMP DISTRICT · 17,208 people · 2019 | 1/3 | SYR4 |
| Toluene | 1.14 µg/L 0.1% of the EPA limit 1000 µg/L Main supplier: DOVER WATER DEPARTMENT · 39,491 people · 2019 | 1/3 | SYR4 |
| 1,2-Dichloroethane | 0.7200 µg/L 14% of the EPA limit 5 µg/L Main supplier: DOVER WATER DEPARTMENT · 39,491 people · 2019 | 1/3 | SYR4 |
| Cadmium | 0.6000 µg/L 12% of the EPA limit 5 µg/L Highest in the ZIP: GARRISON LAKE PUMP DISTRICT · 17,148 people · 2019 | 1/3 | SYR4 |
| Pentachlorophenol | 0.5600 µg/L 56% of the EPA limit 1 µg/L Highest in the ZIP: GARRISON LAKE PUMP DISTRICT · 17,148 people · 2018 | 1/3 | SYR4 |
| Ethylbenzene | 0.5100 µg/L 0.1% of the EPA limit 700 µg/L Main supplier: DOVER WATER DEPARTMENT · 39,491 people · 2019 | 1/3 | SYR4 |
| Lead | 0.0020 mg/L 13% of the EPA limit 0.0150 mg/L Main supplier: DOVER WATER DEPARTMENT · 39,491 people · 2026 | 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.
Water suppliers serving ZIP 19904
| Supplier | State | Population served |
|---|---|---|
| DOVER WATER DEPARTMENT | DE | 39,491 |
| CAMDEN PUMP DISTRICT | 17,208 | |
| GARRISON LAKE PUMP DISTRICT | 17,148 |
Frequently asked questions about ZIP 19904 tap water
Is the tap water in ZIP 19904 safe to drink?
EPA testing detected 32 contaminants across the water suppliers serving ZIP 19904. 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 19904?
3 public water suppliers report EPA drinking-water monitoring for ZIP 19904. Each is listed above with its population served.
What contaminants are in ZIP 19904's water?
EPA monitoring detected Nitrate-Nitrite, Nitrate, Fluoride, Nitrite, Copper, and others across this ZIP's suppliers. The full list with levels and sources is above.