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Tap water quality report

Dewey Beach, DE

EPA monitoring detected 21 contaminants across the 2 water suppliers serving Dewey Beach. A detection doesn't automatically mean the water is unsafe — see the level at the main supplier for each below, with its EPA source and period.

2
water suppliers
31,078
people served
21
contaminants found
Delaware rankings Lead in Delaware PFAS in Delaware

What was found in Dewey Beach'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.

ContaminantLevel vs EPA limitSuppliersSource
Nitrate
7900 µg/L 79%
of the EPA limit 10000 µg/L
Highest in the city: CHERRY CREEK VALLEY · 78 people · 2019
1/2 SYR4
Nitrate-Nitrite
7867.42 µg/L 79%
of the EPA limit 10000 µg/L
Highest in the city: CHERRY CREEK VALLEY · 78 people · 2019
1/2 SYR4
Copper
252.65 µg/L 19%
of the EPA limit 1300 µg/L
Main supplier: DEWEY BEACH WATER DEPARTMENT · 31,000 people · 2017
Highest in the city: 678 µg/L — CHERRY CREEK VALLEY · 78 people · 2019
2/2 SYR4
TTHM
53.955 µg/L 67%
of the EPA limit 80 µg/L
Main supplier: DEWEY BEACH WATER DEPARTMENT · 31,000 people · 2019
1/2 SYR4
Chloroform
33.25 µg/L
No EPA limit set
Main supplier: DEWEY BEACH WATER DEPARTMENT · 31,000 people · 2019
1/2 SYR4
Lead
7.385 µg/L 49%
of the EPA limit 15 µg/L
Main supplier: DEWEY BEACH WATER DEPARTMENT · 31,000 people · 2017
Highest in the city: 14.36 µg/L — CHERRY CREEK VALLEY · 78 people · 2019
2/2 SYR4
Bromodichloromethane
12.37 µg/L
No EPA limit set
Main supplier: DEWEY BEACH WATER DEPARTMENT · 31,000 people · 2019
1/2 SYR4
Total Haloacetic Acids (HAA5)
9.88475 µg/L 16%
of the EPA limit 60 µg/L
Main supplier: DEWEY BEACH WATER DEPARTMENT · 31,000 people · 2019
1/2 SYR4
Dibromochloromethane
9.194 µg/L
No EPA limit set
Main supplier: DEWEY BEACH WATER DEPARTMENT · 31,000 people · 2019
1/2 SYR4
Bromoform
8.782 µg/L
No EPA limit set
Main supplier: DEWEY BEACH WATER DEPARTMENT · 31,000 people · 2019
1/2 SYR4
Trichloroacetic Acid
3.99 µg/L
No EPA limit set
Main supplier: DEWEY BEACH WATER DEPARTMENT · 31,000 people · 2019
1/2 SYR4
Dichloroacetic Acid
3.5307 µg/L
No EPA limit set
Main supplier: DEWEY BEACH WATER DEPARTMENT · 31,000 people · 2019
1/2 SYR4
Dibromoacetic Acid
3.1833 µg/L
No EPA limit set
Main supplier: DEWEY BEACH WATER DEPARTMENT · 31,000 people · 2019
1/2 SYR4
Di(2-ethylhexyl) Phthalate
1.7 µg/L 28%
of the EPA limit 6 µg/L
Highest in the city: CHERRY CREEK VALLEY · 78 people · 2018
1/2 SYR4
Combined Radium (-226 And -228)
0.7805 pCi/L 16%
of the EPA limit 5 pCi/L
Highest in the city: CHERRY CREEK VALLEY · 78 people · 2019
1/2 SYR4
PFOA
0.0110 µg/L
No EPA limit set
Main supplier: DEWEY BEACH WATER DEPARTMENT · 31,000 people · 2024
1/2 UCMR-5
Lead
0.0 mg/L 0%
of the EPA limit 0.0150 mg/L
Main supplier: DEWEY BEACH WATER DEPARTMENT · 31,000 people · 2023
Highest in the city: 0.0069 mg/L — CHERRY CREEK VALLEY · 78 people · 2025
2/2 LCR
PFBS
0.0050 µg/L
No EPA limit set
Main supplier: DEWEY BEACH WATER DEPARTMENT · 31,000 people · 2024
1/2 UCMR-5
Pfhxa
0.0042 µg/L
No EPA limit set
Main supplier: DEWEY BEACH WATER DEPARTMENT · 31,000 people · 2024
1/2 UCMR-5
Pfpea
0.0038 µg/L
No EPA limit set
Main supplier: DEWEY BEACH WATER DEPARTMENT · 31,000 people · 2024
1/2 UCMR-5
PFHXS
0.0035 µg/L
No EPA limit set
Main supplier: DEWEY BEACH WATER DEPARTMENT · 31,000 people · 2024
1/2 UCMR-5
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 Dewey Beach

SupplierPopulation served
DEWEY BEACH WATER DEPARTMENT 31,000
CHERRY CREEK VALLEY 78

Frequently asked questions about Dewey Beach tap water

Is Dewey Beach tap water safe to drink?

EPA testing detected 21 contaminants in the water serving Dewey Beach. 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 Dewey Beach?

2 public water suppliers report drinking-water monitoring for Dewey Beach, Delaware to the EPA. Each is listed above with its population served.

What contaminants are in Dewey Beach's water?

The contaminants EPA monitoring detected in Dewey Beach include Nitrate, Nitrate-Nitrite, Copper, TTHM, Chloroform. 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.