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Tap water quality report

Flandreau, SD

EPA monitoring detected 8 contaminants across the 3 water suppliers serving Flandreau. 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.

3
water suppliers
2,854
people served
8
contaminants found
South Dakota rankings Lead in South Dakota PFAS in South Dakota

What was found in Flandreau'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
Copper
45.5 µg/L 3.5%
of the EPA limit 1300 µg/L
Main supplier: FLANDREAU · 2,372 people · 2018
Highest in the city: 2120 µg/L — PLEASANT VALLEY COLONY · 107 people · 2019
3/3 SYR4
Fluoride
300 µg/L 7.5%
of the EPA limit 4000 µg/L
Highest in the city: PLEASANT VALLEY COLONY · 107 people · 2012
1/3 SYR4
Barium
72 µg/L 3.6%
of the EPA limit 2000 µg/L
Highest in the city: PLEASANT VALLEY COLONY · 107 people · 2012
1/3 SYR4
TTHM
31.75 µg/L 40%
of the EPA limit 80 µg/L
Main supplier: FLANDREAU · 2,372 people · 2019
Highest in the city: 41.94 µg/L — FLANDREAU SCHOOL · 375 people · 2017
2/3 SYR4
Total Haloacetic Acids (HAA5)
11.5415 µg/L 19%
of the EPA limit 60 µg/L
Main supplier: FLANDREAU · 2,372 people · 2019
Highest in the city: 11.575 µg/L — FLANDREAU SCHOOL · 375 people · 2017
2/3 SYR4
Lead
2.4 µg/L 16%
of the EPA limit 15 µg/L
Main supplier: FLANDREAU · 2,372 people · 2018
Highest in the city: 8.26 µg/L — FLANDREAU SCHOOL · 375 people · 2017
3/3 SYR4
Gross Alpha, Excl. Radon And U
5.21 pCi/L 35%
of the EPA limit 15 pCi/L
Highest in the city: PLEASANT VALLEY COLONY · 107 people · 2019
1/3 SYR4
Lead
0.0010 mg/L 6.7%
of the EPA limit 0.0150 mg/L
Main supplier: FLANDREAU · 2,372 people · 2024
Highest in the city: 0.0077 mg/L — FLANDREAU SCHOOL · 375 people · 2025
3/3 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 Flandreau

SupplierPopulation served
FLANDREAU 2,372
FLANDREAU SCHOOL 375
PLEASANT VALLEY COLONY 107

Frequently asked questions about Flandreau tap water

Is Flandreau tap water safe to drink?

EPA testing detected 8 contaminants in the water serving Flandreau. 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 Flandreau?

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

What contaminants are in Flandreau's water?

The contaminants EPA monitoring detected in Flandreau include Copper, Fluoride, Barium, 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.