What was found in ZIP 19720
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 | 6961.5 µg/L 70% of the EPA limit 10000 µg/L Main supplier: ARTESIAN WATER COMPANY · 231,114 people · 2019 | 4/4 | SYR4 |
| Nitrate-Nitrite | 6559 µg/L 66% of the EPA limit 10000 µg/L Main supplier: ARTESIAN WATER COMPANY · 231,114 people · 2019 | 4/4 | SYR4 |
| Fluoride | 958.1 µg/L 24% of the EPA limit 4000 µg/L Main supplier: ARTESIAN WATER COMPANY · 231,114 people · 2019
Highest in the ZIP: 1200 µg/L — VEOLIA WATER DELAWARE, INC · 100,495 people · 2019 | 4/4 | SYR4 |
| Copper | 335.3 µg/L 26% of the EPA limit 1300 µg/L Main supplier: ARTESIAN WATER COMPANY · 231,114 people · 2017
Highest in the ZIP: 337.25 µg/L — WILMINGTON WATER DEPARTMENT · 107,976 people · 2017 | 4/4 | SYR4 |
| Barium | 187 µg/L 9.4% of the EPA limit 2000 µg/L Main supplier: ARTESIAN WATER COMPANY · 231,114 people · 2019 | 4/4 | SYR4 |
| Lead | 47.865 µg/L 319% of the EPA limit, at the 95th percentile of samples — 15 µg/L Main supplier: ARTESIAN WATER COMPANY · 231,114 people · 2017
Highest in the ZIP: 127.75 µg/L — MUNICIPAL SERVICES COMMISSION · 5,549 people · 2019 | 4/4 | SYR4 |
| TTHM | 80 µg/L 100% of the EPA limit 80 µg/L Main supplier: ARTESIAN WATER COMPANY · 231,114 people · 2019
Highest in the ZIP: 85.5 µg/L — WILMINGTON WATER DEPARTMENT · 107,976 people · 2019 | 4/4 | SYR4 |
| Chloroform | 59.65 µg/L No EPA limit set Main supplier: ARTESIAN WATER COMPANY · 231,114 people · 2019
Highest in the ZIP: 64.755 µg/L — WILMINGTON WATER DEPARTMENT · 107,976 people · 2019 | 4/4 | SYR4 |
| Total Haloacetic Acids (HAA5) | 60 µg/L 100% of the EPA limit 60 µg/L Main supplier: ARTESIAN WATER COMPANY · 231,114 people · 2019
Highest in the ZIP: 64.3 µg/L — WILMINGTON WATER DEPARTMENT · 107,976 people · 2019 | 4/4 | SYR4 |
| Dichloroacetic Acid | 33 µg/L No EPA limit set Main supplier: ARTESIAN WATER COMPANY · 231,114 people · 2019
Highest in the ZIP: 33.89 µg/L — WILMINGTON WATER DEPARTMENT · 107,976 people · 2019 | 4/4 | SYR4 |
| Trichloroacetic Acid | 28.685 µg/L No EPA limit set Main supplier: ARTESIAN WATER COMPANY · 231,114 people · 2019 | 3/4 | SYR4 |
| Bromodichloromethane | 12.96 µg/L No EPA limit set Main supplier: ARTESIAN WATER COMPANY · 231,114 people · 2019
Highest in the ZIP: 18 µg/L — VEOLIA WATER DELAWARE, INC · 100,495 people · 2019 | 4/4 | SYR4 |
| Xylenes, Total | 15.1 µg/L 0.2% of the EPA limit 10000 µg/L Main supplier: ARTESIAN WATER COMPANY · 231,114 people · 2019 | 1/4 | SYR4 |
| Gross Beta Particle Activity | 12.1 pCi/L No EPA limit set Highest in the ZIP: VEOLIA WATER DELAWARE, INC · 100,495 people · 2013 | 1/4 | SYR4 |
| Chromium | 11.12 µg/L 11% of the EPA limit 100 µg/L Main supplier: ARTESIAN WATER COMPANY · 231,114 people · 2019 | 3/4 | SYR4 |
| Monochloroacetic Acid | 6.34 µg/L No EPA limit set Main supplier: ARTESIAN WATER COMPANY · 231,114 people · 2019
Highest in the ZIP: 8.455 µg/L — WILMINGTON WATER DEPARTMENT · 107,976 people · 2019 | 3/4 | SYR4 |
| Selenium | 6.58 µg/L 13% of the EPA limit 50 µg/L Main supplier: ARTESIAN WATER COMPANY · 231,114 people · 2019 | 2/4 | SYR4 |
| Combined Radium (-226 And -228) | 6.53 pCi/L 131% of the EPA limit, at the 95th percentile of samples — 5 pCi/L Main supplier: ARTESIAN WATER COMPANY · 231,114 people · 2019 | 4/4 | SYR4 |
| Dibromochloromethane | 3.5 µg/L No EPA limit set Main supplier: ARTESIAN WATER COMPANY · 231,114 people · 2019
Highest in the ZIP: 5.48 µg/L — VEOLIA WATER DELAWARE, INC · 100,495 people · 2019 | 4/4 | SYR4 |
| Toluene | 4.768 µg/L 0.5% of the EPA limit 1000 µg/L Main supplier: ARTESIAN WATER COMPANY · 231,114 people · 2019 | 1/4 | SYR4 |
| Tetrachloroethylene | 4.7555 µg/L 95% of the EPA limit 5 µg/L Main supplier: ARTESIAN WATER COMPANY · 231,114 people · 2019 | 2/4 | SYR4 |
| Chlorobenzene | 2.8 µg/L 2.8% of the EPA limit 100 µg/L Main supplier: ARTESIAN WATER COMPANY · 231,114 people · 2019 | 1/4 | SYR4 |
| Toxaphene | 2.5 µg/L 83% of the EPA limit 3 µg/L Main supplier: ARTESIAN WATER COMPANY · 231,114 people · 2019 | 1/4 | SYR4 |
| Monobromoacetic Acid | 2.135 µg/L No EPA limit set Highest in the ZIP: WILMINGTON WATER DEPARTMENT · 107,976 people · 2019 | 2/4 | SYR4 |
| Bromoform | 2.105 µg/L No EPA limit set Main supplier: ARTESIAN WATER COMPANY · 231,114 people · 2019 | 4/4 | SYR4 |
| Dibromoacetic Acid | 1.862 µg/L No EPA limit set Main supplier: ARTESIAN WATER COMPANY · 231,114 people · 2019
Highest in the ZIP: 2.095 µg/L — WILMINGTON WATER DEPARTMENT · 107,976 people · 2019 | 4/4 | SYR4 |
| Dalapon | 2.035 µg/L 1% of the EPA limit 200 µg/L Highest in the ZIP: WILMINGTON WATER DEPARTMENT · 107,976 people · 2019 | 2/4 | SYR4 |
| Ethylbenzene | 1.922 µg/L 0.3% of the EPA limit 700 µg/L Main supplier: ARTESIAN WATER COMPANY · 231,114 people · 2019 | 1/4 | SYR4 |
| cis-1,2-Dichloroethylene | 1.57 µg/L 2.2% of the EPA limit 70 µg/L Main supplier: ARTESIAN WATER COMPANY · 231,114 people · 2019 | 1/4 | SYR4 |
| 1,2-Dichloroethane | 1.429 µg/L 29% of the EPA limit 5 µg/L Main supplier: ARTESIAN WATER COMPANY · 231,114 people · 2019 | 1/4 | SYR4 |
| Arsenic | 1.2625 µg/L 13% of the EPA limit 10 µg/L Main supplier: ARTESIAN WATER COMPANY · 231,114 people · 2019 | 4/4 | SYR4 |
| Chlordane | 0.8480 µg/L 42% of the EPA limit 2 µg/L Main supplier: ARTESIAN WATER COMPANY · 231,114 people · 2019 | 1/4 | SYR4 |
| Trichloroethylene | 0.8460 µg/L 17% of the EPA limit 5 µg/L Main supplier: ARTESIAN WATER COMPANY · 231,114 people · 2019 | 1/4 | SYR4 |
| Mercury | 0.7235 µg/L 36% of the EPA limit 2 µg/L Main supplier: ARTESIAN WATER COMPANY · 231,114 people · 2019 | 1/4 | SYR4 |
| Di(2-ethylhexyl) Phthalate | 0.5766 µg/L 9.6% of the EPA limit 6 µg/L Main supplier: ARTESIAN WATER COMPANY · 231,114 people · 2019
Highest in the ZIP: 0.6100 µg/L — VEOLIA WATER DELAWARE, INC · 100,495 people · 2017 | 3/4 | SYR4 |
| Pentachlorophenol | 0.4700 µg/L 47% of the EPA limit 1 µg/L Main supplier: ARTESIAN WATER COMPANY · 231,114 people · 2019 | 1/4 | SYR4 |
| Benzene | 0.3400 µg/L 6.8% of the EPA limit 5 µg/L Main supplier: ARTESIAN WATER COMPANY · 231,114 people · 2019 | 1/4 | SYR4 |
| 1,1-Dichloroethylene | 0.3200 µg/L 4.6% of the EPA limit 7 µg/L Main supplier: ARTESIAN WATER COMPANY · 231,114 people · 2019 | 1/4 | SYR4 |
| 2,4-D | 0.2850 µg/L 0.4% of the EPA limit 70 µg/L Highest in the ZIP: WILMINGTON WATER DEPARTMENT · 107,976 people · 2019 | 2/4 | SYR4 |
| Pfba | 0.0791 µg/L No EPA limit set Main supplier: ARTESIAN WATER COMPANY · 231,114 people · 2025
Highest in the ZIP: 0.1472 µg/L — MUNICIPAL SERVICES COMMISSION · 5,549 people · 2023 | 4/4 | UCMR-5 |
| Atrazine | 0.1455 µg/L 4.9% of the EPA limit 3 µg/L Main supplier: ARTESIAN WATER COMPANY · 231,114 people · 2019 | 3/4 | SYR4 |
| 1,1,1-Trichloroethane | 0.1355 µg/L 0.1% of the EPA limit 200 µg/L Main supplier: ARTESIAN WATER COMPANY · 231,114 people · 2019 | 1/4 | SYR4 |
| Di(2-ethylhexyl) Adipate | 0.1310 µg/L 0% of the EPA limit 400 µg/L Main supplier: ARTESIAN WATER COMPANY · 231,114 people · 2019 | 2/4 | SYR4 |
| Pfpea | 0.1060 µg/L No EPA limit set Main supplier: ARTESIAN WATER COMPANY · 231,114 people · 2025
Highest in the ZIP: 0.1229 µg/L — MUNICIPAL SERVICES COMMISSION · 5,549 people · 2023 | 4/4 | UCMR-5 |
| Thallium, Total | 0.1195 µg/L 6% of the EPA limit 2 µg/L Main supplier: ARTESIAN WATER COMPANY · 231,114 people · 2019 | 1/4 | SYR4 |
| Simazine | 0.0900 µg/L 2.3% of the EPA limit 4 µg/L Highest in the ZIP: VEOLIA WATER DELAWARE, INC · 100,495 people · 2017 | 2/4 | SYR4 |
| Hexachlorocyclopentadiene | 0.0770 µg/L 0.2% of the EPA limit 50 µg/L Highest in the ZIP: WILMINGTON WATER DEPARTMENT · 107,976 people · 2019 | 1/4 | SYR4 |
| Pfhxa | 0.0722 µg/L No EPA limit set Main supplier: ARTESIAN WATER COMPANY · 231,114 people · 2025 | 3/4 | UCMR-5 |
| Cadmium | 0.0400 µg/L 0.8% of the EPA limit 5 µg/L Main supplier: ARTESIAN WATER COMPANY · 231,114 people · 2019 | 1/4 | SYR4 |
| Heptachlor Epoxide | 0.0346 µg/L 17% of the EPA limit 0.2000 µg/L Main supplier: ARTESIAN WATER COMPANY · 231,114 people · 2019 | 1/4 | SYR4 |
| Pfhpa | 0.0189 µg/L No EPA limit set Main supplier: ARTESIAN WATER COMPANY · 231,114 people · 2025
Highest in the ZIP: 0.0277 µg/L — VEOLIA WATER DELAWARE, INC · 100,495 people · 2023 | 3/4 | UCMR-5 |
| PFOA | 0.0231 µg/L No EPA limit set Main supplier: ARTESIAN WATER COMPANY · 231,114 people · 2025
Highest in the ZIP: 0.0244 µg/L — VEOLIA WATER DELAWARE, INC · 100,495 people · 2023 | 3/4 | UCMR-5 |
| PFNA | 0.0116 µg/L No EPA limit set Highest in the ZIP: VEOLIA WATER DELAWARE, INC · 100,495 people · 2023 | 1/4 | UCMR-5 |
| PFHXS | 0.0089 µg/L No EPA limit set Main supplier: ARTESIAN WATER COMPANY · 231,114 people · 2025 | 1/4 | UCMR-5 |
| PFBS | 0.0087 µg/L No EPA limit set Main supplier: ARTESIAN WATER COMPANY · 231,114 people · 2025 | 3/4 | UCMR-5 |
| PFOS | 0.0060 µg/L No EPA limit set Main supplier: ARTESIAN WATER COMPANY · 231,114 people · 2025 | 1/4 | UCMR-5 |
| Pfda | 0.0047 µg/L No EPA limit set Highest in the ZIP: VEOLIA WATER DELAWARE, INC · 100,495 people · 2023 | 1/4 | UCMR-5 |
| Pfuna | 0.0038 µg/L No EPA limit set Highest in the ZIP: VEOLIA WATER DELAWARE, INC · 100,495 people · 2023 | 1/4 | UCMR-5 |
| Lead | 0.0010 mg/L 6.7% of the EPA limit 0.0150 mg/L Main supplier: ARTESIAN WATER COMPANY · 231,114 people · 2026
Highest in the ZIP: 0.0020 mg/L — VEOLIA WATER DELAWARE, INC · 100,495 people · 2023 | 4/4 | 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 19720
| Supplier | State | Population served |
|---|---|---|
| ARTESIAN WATER COMPANY | 231,114 | |
| WILMINGTON WATER DEPARTMENT | DE | 107,976 |
| VEOLIA WATER DELAWARE, INC | DE | 100,495 |
| MUNICIPAL SERVICES COMMISSION | DE | 5,549 |
Frequently asked questions about ZIP 19720 tap water
Is the tap water in ZIP 19720 safe to drink?
EPA testing detected 59 contaminants across the water suppliers serving ZIP 19720. 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 19720?
4 public water suppliers report EPA drinking-water monitoring for ZIP 19720. Each is listed above with its population served.
What contaminants are in ZIP 19720's water?
EPA monitoring detected Nitrate, Nitrate-Nitrite, Fluoride, Copper, Barium, and others across this ZIP's suppliers. The full list with levels and sources is above.