Tap Truth EPA drinking water records, in plain English

County drinking water records

DeKalb County, IL drinking water systems

20 community water systems serve DeKalb County, IL, reporting 100,888 people served in all. A system that also serves other counties counts all of its customers here.

6 of them (30%) had at least one health-based violation in the last 10 years. 6 systems still have one unresolved.

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

19 systems filed a lead service line inventory listing 351 lead lines, 152 galvanized lines that must be replaced and 979 lines of unknown material.

2 more systems are placed in DeKalb County, IL by the county their records name because they have no service area map that lines up with their own records, so they are listed apart and not counted here.

Community water systems
20
People served, sum of each system's own figure
100,888
Systems with a health-based violation, last 10 years
6
Systems with one unresolved
6
Lead service lines in inventories
351

Water systems serving DeKalb County

20 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
Dekalb DeKalb 45,000 Groundwater 0 0 98
Sycamore Sycamore 18,500 Groundwater 0 0 5
Sandwich Sandwich 7,156 Groundwater 0 0 5
Northern Illinois University-Dekalb Outside cities and towns 6,500 Purchased groundwater 0 0 0
Genoa Genoa 5,298 Groundwater 0 0 175
Cortland Cortland 4,398 Groundwater 0 0 No inventory
Hinckley Hinckley 2,006 Groundwater 1 0 11
Kirkland Kirkland 2,000 Groundwater 0 0 0
Somonauk Somonauk 1,860 Groundwater 0 0 0
Waterman Waterman 1,497 Groundwater 0 0 0
Maple Park Maple Park 1,484 Groundwater 2 1 0
Kingston Kingston 1,160 Groundwater 2 0 0
Malta Malta 1,143 Groundwater 0 1 0
Suburban Apartments (De Kalb Univ DVL) Outside cities and towns 1,050 Groundwater 0 1 0
Shabbona Shabbona 913 Groundwater 0 1 57
Lee Lee 313 Groundwater 1 0 0
Cortland Corners MHP Outside cities and towns 250 Groundwater 1 11 No inventory
Buck Lake Estates Subdivision Somonauk and land outside it 150 Groundwater 0 0 0
Valley View Subdivision (Dekalb) Outside cities and towns 120 Groundwater 1 1 0
Sandwich Estates MHP Sandwich 90 Purchased groundwater 0 0 0

Systems placed by county record in DeKalb County

2 systems

EPA has no service area map for these systems. They are placed by the county their records name (the counties EPA lists them serving, or the county coded in their IDs where EPA lists none), and without a map they are not counted in the figures above.

System Serves People served Main source Health-based violations, 10 years Unresolved Lead lines
Triangle Manufactured Home Community County on record 124 Purchased groundwater 0 0 0
Donny Brook Estates Subdivision County on record 30 Groundwater 0 0 0

Cities and towns in DeKalb County

13 places

Back to Illinois

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