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Tap water quality report

Bison, SD

EPA monitoring detected 5 contaminants across the 2 water suppliers serving Bison. A detection doesn't automatically mean the water is unsafe — see the highest level found for each below, with its EPA source and period.

2
water suppliers
780
people served
5
contaminants found
South Dakota rankings Lead in South Dakota PFAS in South Dakota

What was found in Bison's water

The highest level seen across the city's suppliers, the EPA limit for each, and where the figure comes from.

ContaminantLevel vs EPA limitSuppliersSource
Copper
490 µg/L 38%
of the EPA limit 1300 µg/L
 2/2 SYR4
Total Haloacetic Acids (HAA5)
25.8 µg/L 43%
of the EPA limit 60 µg/L
 2/2 SYR4
TTHM
17.8 µg/L 22%
of the EPA limit 80 µg/L
 2/2 SYR4
Lead
2.7 µg/L 18%
of the EPA limit 15 µg/L
 2/2 SYR4
Lead
0.0010 mg/L 6.7%
of the EPA limit 0.0150 mg/L
 2/2 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 single worst sample on record — 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 Bison

SupplierPopulation served
PERKINS COUNTY RURAL WATER 470
BISON 310

Frequently asked questions about Bison tap water

Is Bison tap water safe to drink?

EPA testing detected 5 contaminants in the water serving Bison. 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 Bison?

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

What contaminants are in Bison's water?

The contaminants EPA monitoring detected in Bison include Copper, Total Haloacetic Acids (HAA5), TTHM, Lead, Lead. The full list, with the highest level found 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.