Tap WaterIndex

← South Dakota

Tap water quality report

Deadwood, SD

EPA monitoring detected 9 contaminants across the 6 water suppliers serving Deadwood. 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.

6
water suppliers
1,372
people served
9
contaminants found
South Dakota rankings Lead in South Dakota PFAS in South Dakota

What was found in Deadwood'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
Fluoride
3900 µg/L 98%
of the EPA limit 4000 µg/L
Highest in the city: OAK MOUNTAIN COUNTRY ESTATES · 85 people · 2017
2/6 SYR4
Nitrate
657 µg/L 6.6%
of the EPA limit 10000 µg/L
Highest in the city: LEAD-DEADWOOD SANITARY DISTRICT · 0 people · 2019
1/6 SYR4
Copper
74.5 µg/L 5.7%
of the EPA limit 1300 µg/L
Main supplier: DEADWOOD · 1,156 people · 2017
Highest in the city: 134.2 µg/L — MEADOW CREST SANITARY DISTRICT · 63 people · 2019
4/6 SYR4
TTHM
29.13 µg/L 36%
of the EPA limit 80 µg/L
Main supplier: DEADWOOD · 1,156 people · 2019
2/6 SYR4
Total Haloacetic Acids (HAA5)
9.056 µg/L 15%
of the EPA limit 60 µg/L
Main supplier: DEADWOOD · 1,156 people · 2019
1/6 SYR4
Lead
1.44 µg/L 9.6%
of the EPA limit 15 µg/L
Main supplier: DEADWOOD · 1,156 people · 2017
Highest in the city: 8.5 µg/L — OAK MOUNTAIN COUNTRY ESTATES · 85 people · 2019
4/6 SYR4
Gross Alpha, Excl. Radon And U
6.54 pCi/L 44%
of the EPA limit 15 pCi/L
Highest in the city: OAK MOUNTAIN COUNTRY ESTATES · 85 people · 2019
1/6 SYR4
Arsenic
5 µg/L 50%
of the EPA limit 10 µg/L
Highest in the city: OAK MOUNTAIN COUNTRY ESTATES · 85 people · 2017
1/6 SYR4
Lead
0.0020 mg/L 13%
of the EPA limit 0.0150 mg/L
Main supplier: DEADWOOD · 1,156 people · 2023
Highest in the city: 0.0060 mg/L — PILLAR PEAK · 38 people · 2025
6/6 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 Deadwood

SupplierPopulation served
DEADWOOD 1,156
OAK MOUNTAIN COUNTRY ESTATES 85
MEADOW CREST SANITARY DISTRICT 63
PILLAR PEAK 38
TWO BIT RANCH ESTATES 30
LEAD-DEADWOOD SANITARY DISTRICT 0

Frequently asked questions about Deadwood tap water

Is Deadwood tap water safe to drink?

EPA testing detected 9 contaminants in the water serving Deadwood. 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 Deadwood?

6 public water suppliers report drinking-water monitoring for Deadwood, South Dakota to the EPA. Each is listed above with its population served.

What contaminants are in Deadwood's water?

The contaminants EPA monitoring detected in Deadwood include Fluoride, Nitrate, Copper, TTHM, Total Haloacetic Acids (HAA5). 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.