Tap Truth EPA drinking water records, in plain English

County drinking water records

Union County, SD drinking water systems

9 community water systems serve Union County, SD, reporting 23,997 people served in all. A system that also serves other counties counts all of its customers here.

None of them had a health-based violation in the last 10 years.

8 rely mainly on groundwater and 1 on surface water, counting water bought from other systems.

Their lead service line inventories list 12 lead lines, 2 galvanized lines that must be replaced and 3,395 lines of unknown material.

Community water systems
9
People served, sum of each system's own figure
23,997
Systems with a health-based violation, last 10 years
0
Systems with one unresolved
0
Lead service lines in inventories
12

Water systems serving Union County

9 systems

People served is each system's own figure for its whole service area. Violation counts cover the last 10 years of EPA records.

System Serves People served Main source Health-based violations, 10 years Unresolved Lead lines
South Lincoln Rural Water System Canton, Lennox and 4 more and land outside them 5,250 Groundwater 0 0 1
Clay Rural Water System Richland, Elk Point and 5 more and land outside them 4,780 Groundwater 0 0 0
Dakota Dunes Cid Dakota Dunes 3,700 GUP 0 0 0
North Sioux City North Sioux City 3,042 Groundwater 0 0 0
Beresford Beresford and land outside it 2,359 Purchased groundwater 0 0 0
Elk Point Elk Point 2,124 Groundwater 0 0 1
Clay RWS/South Union North Sioux City and land outside it 1,447 Groundwater 0 0 0
Alcester Alcester 820 Purchased groundwater 0 0 10
Jefferson Jefferson 475 Groundwater 0 0 0

Cities and towns in Union County

7 places

Back to South Dakota

Counties come from the counties EPA lists each system serving, matched to 2024 Census counties; where EPA lists none, from the county coded in the system's ID, its service area map, or its mailing address. A county holding at least a fifth of a system's service area map is added when at least a fifth of that map lies in those counties. Towns are the ones EPA lists and the Census places such a map covers, always inside those counties. In New England, where EPA's town names a whole Town, it is not matched to the village of the same name. A system is not listed in a county holding less than a fifth of its map, or in a county or town its map reaches when the map lies mostly outside the counties EPA lists, so a page can leave out a system that serves part of the area. Methodology and limitations