What was found in Millsboro'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 | 3965 µg/L 40% of the EPA limit 10000 µg/L Main supplier: LONG NECK WATER COMPANY · 11,000 people · 2019
Highest in the city: 12145 µg/L — FOREST PARK · 25 people · 2019 | 9/13 | SYR4 |
| Nitrate-Nitrite | 3890 µg/L 39% of the EPA limit 10000 µg/L Main supplier: LONG NECK WATER COMPANY · 11,000 people · 2019
Highest in the city: 12135 µg/L — FOREST PARK · 25 people · 2019 | 9/13 | SYR4 |
| Copper | 128.6 µg/L 9.9% of the EPA limit 1300 µg/L Main supplier: LONG NECK WATER COMPANY · 11,000 people · 2019
Highest in the city: 1401 µg/L — ENCHANTED ACRES MHC LLC · 225 people · 2019 | 12/13 | SYR4 |
| Fluoride | 879.4 µg/L 22% of the EPA limit 4000 µg/L Highest in the city: MILLSBORO WATER DEPARTMENT · 8,568 people · 2019 | 1/13 | SYR4 |
| Barium | 81.627 µg/L 4.1% of the EPA limit 2000 µg/L Main supplier: LONG NECK WATER COMPANY · 11,000 people · 2019
Highest in the city: 515.7 µg/L — CAREY ESTATES, LLC · 312 people · 2015 | 5/13 | SYR4 |
| Cyanide | 111 µg/L 56% of the EPA limit 200 µg/L Highest in the city: COLONIAL ESTATES MOBILE HOME PARK · 165 people · 2019 | 2/13 | SYR4 |
| Lead | 13.555 µg/L 90% of the EPA limit 15 µg/L Main supplier: LONG NECK WATER COMPANY · 11,000 people · 2019
Highest in the city: 40.5 µg/L — ENCHANTED ACRES MHC LLC · 225 people · 2019 | 12/13 | SYR4 |
| Di(2-ethylhexyl) Phthalate | 14 µg/L 233% of the EPA limit, at the 95th percentile of samples — 6 µg/L Highest in the city: LONG NECK VILLAGE · 345 people · 2019 | 3/13 | SYR4 |
| TTHM | 3.773 µg/L 4.7% of the EPA limit 80 µg/L Main supplier: LONG NECK WATER COMPANY · 11,000 people · 2019
Highest in the city: 10.93 µg/L — BAYWOOD GREENS · 909 people · 2019 | 6/13 | SYR4 |
| Total Haloacetic Acids (HAA5) | 7.5151 µg/L 13% of the EPA limit 60 µg/L Highest in the city: COLONIAL ESTATES MOBILE HOME PARK · 165 people · 2018 | 3/13 | SYR4 |
| Dibromochloromethane | 1.174 µg/L No EPA limit set Main supplier: LONG NECK WATER COMPANY · 11,000 people · 2019
Highest in the city: 4.0745 µg/L — BAYWOOD GREENS · 909 people · 2019 | 6/13 | SYR4 |
| Xylenes, Total | 4.0735 µg/L 0% of the EPA limit 10000 µg/L Highest in the city: MILLSBORO WATER DEPARTMENT · 8,568 people · 2019 | 1/13 | SYR4 |
| Dichloroacetic Acid | 4.0164 µg/L No EPA limit set Highest in the city: COLONIAL ESTATES MOBILE HOME PARK · 165 people · 2018 | 3/13 | SYR4 |
| Bromodichloromethane | 0.7580 µg/L No EPA limit set Main supplier: LONG NECK WATER COMPANY · 11,000 people · 2019
Highest in the city: 3.6565 µg/L — BAYWOOD GREENS · 909 people · 2019 | 6/13 | SYR4 |
| Trichloroacetic Acid | 3.57585 µg/L No EPA limit set Highest in the city: COLONIAL ESTATES MOBILE HOME PARK · 165 people · 2018 | 2/13 | SYR4 |
| Chromium | 3.2 µg/L 3.2% of the EPA limit 100 µg/L Main supplier: LONG NECK WATER COMPANY · 11,000 people · 2019
Highest in the city: 3.4 µg/L — COUNTRY LIVING MOBILE COURT · 255 people · 2019 | 6/13 | SYR4 |
| Chloroform | 1.575 µg/L No EPA limit set Main supplier: LONG NECK WATER COMPANY · 11,000 people · 2019
Highest in the city: 2.865 µg/L — MILLSBORO WATER DEPARTMENT · 8,568 people · 2019 | 9/13 | SYR4 |
| Dibromoacetic Acid | 2.52 µg/L No EPA limit set Highest in the city: BAYWOOD GREENS · 909 people · 2019 | 2/13 | SYR4 |
| Bromoform | 0.5195 µg/L No EPA limit set Main supplier: LONG NECK WATER COMPANY · 11,000 people · 2019
Highest in the city: 1.527 µg/L — BAYWOOD GREENS · 909 people · 2019 | 3/13 | SYR4 |
| Combined Radium (-226 And -228) | 0.8450 pCi/L 17% of the EPA limit 5 pCi/L Main supplier: LONG NECK WATER COMPANY · 11,000 people · 2019
Highest in the city: 1.391 pCi/L — COUNTRY LIVING MOBILE COURT · 255 people · 2012 | 11/13 | SYR4 |
| Arsenic | 1.11 µg/L 11% of the EPA limit 10 µg/L Highest in the city: ENCHANTED ACRES MHC LLC · 225 people · 2019 | 2/13 | SYR4 |
| Mercury | 1 µg/L 50% of the EPA limit 2 µg/L Main supplier: LONG NECK WATER COMPANY · 11,000 people · 2019 | 1/13 | SYR4 |
| Selenium | 0.9900 µg/L 2% of the EPA limit 50 µg/L Main supplier: LONG NECK WATER COMPANY · 11,000 people · 2019 | 2/13 | SYR4 |
| Ethylbenzene | 0.5490 µg/L 0.1% of the EPA limit 700 µg/L Highest in the city: MILLSBORO WATER DEPARTMENT · 8,568 people · 2019 | 1/13 | SYR4 |
| cis-1,2-Dichloroethylene | 0.5000 µg/L 0.7% of the EPA limit 70 µg/L Highest in the city: MILLSBORO WATER DEPARTMENT · 8,568 people · 2019 | 1/13 | SYR4 |
| Picloram | 0.3000 µg/L 0.1% of the EPA limit 500 µg/L Highest in the city: HOMESTEAD PARK · 230 people · 2019 | 1/13 | SYR4 |
| Monobromoacetic Acid | 0.1000 µg/L No EPA limit set Highest in the city: MILLSBORO WATER DEPARTMENT · 8,568 people · 2019 | 1/13 | SYR4 |
| Lead | 0.0011 mg/L 7.3% of the EPA limit 0.0150 mg/L Main supplier: LONG NECK WATER COMPANY · 11,000 people · 2023
Highest in the city: 0.0115 mg/L — CAREY ESTATES, LLC · 312 people · 2025 | 13/13 | 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 Millsboro
| Supplier | Population served |
|---|---|
| LONG NECK WATER COMPANY | 11,000 |
| MILLSBORO WATER DEPARTMENT | 8,568 |
| BAYWOOD GREENS | 909 |
| LONG NECK VILLAGE | 345 |
| SHAWNS HIDEAWAY SYSTEM #1 | 341 |
| CAREY ESTATES, LLC | 312 |
| COUNTRY LIVING MOBILE COURT | 255 |
| HOMESTEAD PARK | 230 |
| ENCHANTED ACRES MHC LLC | 225 |
| WOODLANDS OF MILLSBORO PUMP DISTRICT | 171 |
| COLONIAL ESTATES MOBILE HOME PARK | 165 |
| INGRAMS POINT (AWC) | 87 |
| FOREST PARK | 25 |
Frequently asked questions about Millsboro tap water
Is Millsboro tap water safe to drink?
EPA testing detected 28 contaminants in the water serving Millsboro. 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 Millsboro?
13 public water suppliers report drinking-water monitoring for Millsboro, Delaware to the EPA. Each is listed above with its population served.
What contaminants are in Millsboro's water?
The contaminants EPA monitoring detected in Millsboro include Nitrate, Nitrate-Nitrite, Copper, Fluoride, 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.