What was found in Delmar'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 | 3400 µg/L 34% of the EPA limit 10000 µg/L Main supplier: DELMAR UTILITY COMM (TN OF DELMAR) · 2,027 people · 2019
Highest in the city: 9256.35 µg/L — COUNTRY GROVE · 426 people · 2019 | 4/4 | SYR4 |
| Nitrate-Nitrite | 3400 µg/L 34% of the EPA limit 10000 µg/L Main supplier: DELMAR UTILITY COMM (TN OF DELMAR) · 2,027 people · 2019
Highest in the city: 9064.2 µg/L — COUNTRY GROVE · 426 people · 2019 | 4/4 | SYR4 |
| Fluoride | 978 µg/L 24% of the EPA limit 4000 µg/L Main supplier: DELMAR UTILITY COMM (TN OF DELMAR) · 2,027 people · 2019 | 1/4 | SYR4 |
| Copper | 270.5 µg/L 21% of the EPA limit 1300 µg/L Main supplier: DELMAR UTILITY COMM (TN OF DELMAR) · 2,027 people · 2019
Highest in the city: 534 µg/L — STAGE VILLAGE MHC · 93 people · 2019 | 4/4 | SYR4 |
| Barium | 158.13 µg/L 7.9% of the EPA limit 2000 µg/L Main supplier: DELMAR UTILITY COMM (TN OF DELMAR) · 2,027 people · 2019 | 4/4 | SYR4 |
| TTHM | 17.02 µg/L 21% of the EPA limit 80 µg/L Main supplier: DELMAR UTILITY COMM (TN OF DELMAR) · 2,027 people · 2019 | 2/4 | SYR4 |
| Lead | 1.1 µg/L 7.3% of the EPA limit 15 µg/L Main supplier: DELMAR UTILITY COMM (TN OF DELMAR) · 2,027 people · 2019
Highest in the city: 12.9775 µg/L — STAGE VILLAGE MHC · 93 people · 2019 | 3/4 | SYR4 |
| Total Haloacetic Acids (HAA5) | 4.5626 µg/L 7.6% of the EPA limit 60 µg/L Main supplier: DELMAR UTILITY COMM (TN OF DELMAR) · 2,027 people · 2019 | 2/4 | SYR4 |
| Bromodichloromethane | 2.4725 µg/L No EPA limit set Main supplier: DELMAR UTILITY COMM (TN OF DELMAR) · 2,027 people · 2019
Highest in the city: 3.5985 µg/L — COUNTRY GROVE · 426 people · 2019 | 2/4 | SYR4 |
| Dibromochloromethane | 2.47 µg/L No EPA limit set Main supplier: DELMAR UTILITY COMM (TN OF DELMAR) · 2,027 people · 2019
Highest in the city: 3.134 µg/L — COUNTRY GROVE · 426 people · 2019 | 3/4 | SYR4 |
| Bromoform | 2.785 µg/L No EPA limit set Main supplier: DELMAR UTILITY COMM (TN OF DELMAR) · 2,027 people · 2019 | 2/4 | SYR4 |
| Dibromoacetic Acid | 2.77045 µg/L No EPA limit set Main supplier: DELMAR UTILITY COMM (TN OF DELMAR) · 2,027 people · 2019 | 1/4 | SYR4 |
| Chloroform | 2.072 µg/L No EPA limit set Main supplier: DELMAR UTILITY COMM (TN OF DELMAR) · 2,027 people · 2019
Highest in the city: 2.438 µg/L — HOLLY OAK MOBILE HOME PARK · 210 people · 2019 | 3/4 | SYR4 |
| Dichloroacetic Acid | 1.8483 µg/L No EPA limit set Main supplier: DELMAR UTILITY COMM (TN OF DELMAR) · 2,027 people · 2019 | 2/4 | SYR4 |
| Xylenes, Total | 1.411 µg/L 0% of the EPA limit 10000 µg/L Main supplier: DELMAR UTILITY COMM (TN OF DELMAR) · 2,027 people · 2019 | 1/4 | SYR4 |
| Combined Radium (-226 And -228) | 1.1397 pCi/L 23% of the EPA limit 5 pCi/L Main supplier: DELMAR UTILITY COMM (TN OF DELMAR) · 2,027 people · 2016 | 4/4 | SYR4 |
| Chromium | 1 µg/L 1% of the EPA limit 100 µg/L Highest in the city: COUNTRY GROVE · 426 people · 2019 | 1/4 | SYR4 |
| Tetrachloroethylene | 0.7140 µg/L 14% of the EPA limit 5 µg/L Main supplier: DELMAR UTILITY COMM (TN OF DELMAR) · 2,027 people · 2019 | 1/4 | SYR4 |
| Selenium | 0.5400 µg/L 1.1% of the EPA limit 50 µg/L Highest in the city: HOLLY OAK MOBILE HOME PARK · 210 people · 2019 | 1/4 | SYR4 |
| Toluene | 0.5000 µg/L 0.1% of the EPA limit 1000 µg/L Highest in the city: COUNTRY GROVE · 426 people · 2019 | 1/4 | SYR4 |
| Benzene | 0.3000 µg/L 6% of the EPA limit 5 µg/L Main supplier: DELMAR UTILITY COMM (TN OF DELMAR) · 2,027 people · 2019 | 1/4 | SYR4 |
| Trichloroethylene | 0.1000 µg/L 2% of the EPA limit 5 µg/L Main supplier: DELMAR UTILITY COMM (TN OF DELMAR) · 2,027 people · 2019 | 1/4 | SYR4 |
| PFBS | 0.0127 µg/L No EPA limit set Highest in the city: STAGE VILLAGE MHC · 93 people · 2023 | 1/4 | UCMR-5 |
| PFOS | 0.0085 µg/L No EPA limit set Highest in the city: STAGE VILLAGE MHC · 93 people · 2023 | 1/4 | UCMR-5 |
| PFOA | 0.0076 µg/L No EPA limit set Highest in the city: STAGE VILLAGE MHC · 93 people · 2023 | 1/4 | UCMR-5 |
| Pfpea | 0.0046 µg/L No EPA limit set Highest in the city: STAGE VILLAGE MHC · 93 people · 2023 | 1/4 | UCMR-5 |
| Pfhxa | 0.0045 µg/L No EPA limit set Highest in the city: STAGE VILLAGE MHC · 93 people · 2023 | 1/4 | UCMR-5 |
| Lead | 0.0020 mg/L 13% of the EPA limit 0.0150 mg/L Main supplier: DELMAR UTILITY COMM (TN OF DELMAR) · 2,027 people · 2024
Highest in the city: 0.0037 mg/L — STAGE VILLAGE MHC · 93 people · 2024 | 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.
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 Delmar
| Supplier | Population served |
|---|---|
| DELMAR UTILITY COMM (TN OF DELMAR) | 2,027 |
| COUNTRY GROVE | 426 |
| HOLLY OAK MOBILE HOME PARK | 210 |
| STAGE VILLAGE MHC | 93 |
Frequently asked questions about Delmar tap water
Is Delmar tap water safe to drink?
EPA testing detected 28 contaminants in the water serving Delmar. 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 Delmar?
4 public water suppliers report drinking-water monitoring for Delmar, Delaware to the EPA. Each is listed above with its population served.
What contaminants are in Delmar's water?
The contaminants EPA monitoring detected in Delmar include Nitrate, Nitrate-Nitrite, Fluoride, Copper, 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.