Tap Truth EPA drinking water records, in plain English

County drinking water records

Lyon County, IA drinking water systems

11 community water systems serve Lyon County, IA, reporting 11,591 people served in all.

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

11 rely mainly on groundwater, counting water bought from other systems.

Their lead service line inventories list 4 lead lines, 151 galvanized lines that must be replaced and 866 lines of unknown material.

1 more system is placed in Lyon County, IA by the county its records name because it has no service area map that lines up with its own records, so it is listed apart and not counted here.

Community water systems
11
People served, sum of each system's own figure
11,591
Systems with a health-based violation, last 10 years
0
Systems with one unresolved
1
Lead service lines in inventories
4

Water systems serving Lyon County

11 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
Rock Rapids Municipal Water Works Rock Rapids 2,611 Groundwater 0 0 4
Lyon-Sioux RWS-Doon Doon 1,765 Groundwater 0 0 0
Lyon-Sioux RWS-Big Sioux Larchwood and Rock Rapids and land outside them 1,530 Groundwater 0 0 0
Lyon-Sioux RWS-Rock Rapids Rock Rapids and land outside it 1,187 Purchased groundwater 0 0 0
George Water Supply George 1,082 Groundwater 0 0 0
Inwood Water Supply Inwood 928 Purchased groundwater 0 0 0
Larchwood Water Supply Larchwood 926 Purchased groundwater 0 1 0
Doon Water Supply Doon 619 Purchased groundwater 0 0 0
Little Rock Water Supply Little Rock 441 Purchased groundwater 0 0 0
Lester Water Supply Lester 296 Purchased groundwater 0 0 0
Alvord Municipal Water Supply Alvord 206 Purchased groundwater 0 0 0

Systems placed by county record in Lyon County

1 system

EPA has no service area map for this system. It is placed by the county its records name (the counties EPA lists it serving, or the county coded in its ID where EPA lists none), and without a map it is not counted in the figures above.

System Serves People served Main source Health-based violations, 10 years Unresolved Lead lines
Lyon-Sioux RWS-Boyden County on record 605 Groundwater 0 0 0

Cities and towns in Lyon County

8 places

Back to Iowa

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