What's in BIG SIOUX COMMUNITY WATER SYSTEM's water?

BIG SIOUX COMMUNITY WATER SYSTEM's only violations on record are reporting or monitoring lapses, not a contaminant or treatment-technique failure EPA classifies as health-based. It serves 5,800 people through 2,330 service connections.

How this compares nationally

4 total violations and 0 health-based ones put BIG SIOUX COMMUNITY WATER SYSTEM at the 12th percentile nationally for violation burden, rank 11,413 of 12,903.

How BIG SIOUX COMMUNITY WATER SYSTEM compares within SD

BIG SIOUX COMMUNITY WATER SYSTEM's 0 health-based violations sit within the SD average of 3.0, across 74 systems statewide. See the lead and copper guide for why lead counts differently.

Most recent violation on record

The last violation EPA has on record for BIG SIOUX COMMUNITY WATER SYSTEM is from 2021-01-07. Last reported to EPA: 06/17/2026.

What this data is and is not

Everything on this page is BIG SIOUX COMMUNITY WATER SYSTEM's own reported record under the Safe Drinking Water Act - a regulatory filing, not a sample of your tap. Between the utility's meter and BIG SIOUX COMMUNITY WATER SYSTEM's customers' taps is household plumbing, invisible to a system-level record ranked 11,413th of 12,903 by violation count. The guide to what this data misses covers that gap.