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Tap water quality report

Lead, SD

EPA monitoring detected 9 contaminants across the 6 water suppliers serving Lead. 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
3,763
people served
9
contaminants found
South Dakota rankings Lead in South Dakota PFAS in South Dakota

What was found in Lead'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
3850 µg/L 39%
of the EPA limit 10000 µg/L
Highest in the city: TERRY TROJAN WATER DISTRICT · 400 people · 2019
2/6 SYR4
Copper
105.2 µg/L 8.1%
of the EPA limit 1300 µg/L
Main supplier: LEAD · 2,982 people · 2019
Highest in the city: 548.7 µg/L — TERRY TROJAN WATER DISTRICT · 400 people · 2017
5/6 SYR4
Fluoride
100 µg/L 2.5%
of the EPA limit 4000 µg/L
Highest in the city: DEER MOUNTAIN SANITARY DISTRICT · 125 people · 2019
2/6 SYR4
Barium
75 µg/L 3.8%
of the EPA limit 2000 µg/L
Highest in the city: EAGLE WATER COMPANY · 48 people · 2019
2/6 SYR4
TTHM
13.715 µg/L 17%
of the EPA limit 80 µg/L
Main supplier: LEAD · 2,982 people · 2019
Highest in the city: 61.94 µg/L — PARADISE WATER COMPANY LLC · 178 people · 2019
5/6 SYR4
Total Haloacetic Acids (HAA5)
6.87 µg/L 11%
of the EPA limit 60 µg/L
Main supplier: LEAD · 2,982 people · 2019
Highest in the city: 30 µg/L — DEER MOUNTAIN SANITARY DISTRICT · 125 people · 2019
3/6 SYR4
Lead
2 µg/L 13%
of the EPA limit 15 µg/L
Main supplier: LEAD · 2,982 people · 2019
Highest in the city: 9 µg/L — TERRY TROJAN WATER DISTRICT · 400 people · 2017
5/6 SYR4
Gross Alpha, Excl. Radon And U
2.63 pCi/L 18%
of the EPA limit 15 pCi/L
Highest in the city: TERRY TROJAN WATER DISTRICT · 400 people · 2014
2/6 SYR4
Lead
0.0010 mg/L 6.7%
of the EPA limit 0.0150 mg/L
Main supplier: LEAD · 2,982 people · 2025
Highest in the city: 0.0040 mg/L — TERRY TROJAN WATER DISTRICT · 400 people · 2023
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 Lead

SupplierPopulation served
LEAD 2,982
TERRY TROJAN WATER DISTRICT 400
PARADISE WATER COMPANY LLC 178
DEER MOUNTAIN SANITARY DISTRICT 125
EAGLE WATER COMPANY 48
GOLDEN HILLS SUBDIVISION 30

Frequently asked questions about Lead tap water

Is Lead tap water safe to drink?

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

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

What contaminants are in Lead's water?

The contaminants EPA monitoring detected in Lead include Nitrate, Copper, Fluoride, Barium, TTHM. 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.