Tap Truth EPA drinking water records, in plain English

County drinking water records

St. Charles County, MO drinking water systems

15 community water systems serve St. Charles County, MO, reporting 1,415,887 people served in all. A system that also serves other counties counts all of its customers here.

1 of them (7%) had at least one health-based violation in the last 10 years. 3 systems still have one unresolved.

10 rely mainly on groundwater and 5 on surface water, counting water bought from other systems.

Their lead service line inventories list 9,430 lead lines, 1,248 galvanized lines that must be replaced and 212,350 lines of unknown material.

4 more systems are placed in St. Charles County, MO 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
15
People served, sum of each system's own figure
1,415,887
Systems with a health-based violation, last 10 years
1
Systems with one unresolved
3
Lead service lines in inventories
9,430

Water systems serving St. Charles County

15 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
MO American St Louis St Charles Counties Chesterfield, Wildwood and 98 more 1,111,000 Surface water 0 0 9,422
St Charles County PWSD 2 O'Fallon, Wentzville and 9 more and land outside them 100,587 Purchased surface water 0 0 0
St Charles PWS St. Charles 73,040 Purchased surface water 0 0 7
St Peters PWS St. Peters and Cottleville 52,575 Purchased surface water 0 0 0
Wentzville PWS Wentzville 41,784 Groundwater 0 0 1
Ofallon PWS O'Fallon 32,515 Purchased surface water 0 0 0
St Paul PWS St. Paul 1,700 Groundwater 0 0 0
St Charles Co PWSD 2 Augusta Augusta and land outside it 881 Groundwater 0 0 0
St Charles PWSD 2 Foristell Foristell 550 Groundwater 0 1 0
MO American Jaxson Foristell and land outside it 535 Groundwater 0 0 0
Portage Des Sioux PWS Portage Des Sioux 345 Groundwater 1 0 0
Prairie View Acres Subd Outside cities and towns 135 Groundwater 0 1 0
Weldon Spring Heights Village PWS Weldon Spring 100 Groundwater 0 0 0
Big Country Acres Subdivision Outside cities and towns 90 Groundwater 0 0 0
Country Estates Outside cities and towns 50 Groundwater 0 2 0

Systems placed by county record in St. Charles County

4 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
Ecm Water & Sewer Authority - Flint Hill County on record 469 Groundwater 0 0 0
St Charles Co PWSD 2 - Sumac Ridge County on record 103 Groundwater 0 0 0
Tara Oaks Manor Assn County on record 100 Groundwater 0 0 0
Confluence Rivers Stone Ridge Meadows County on record 60 Groundwater 3 0 0

Cities and towns in St. Charles County

16 places

Back to Missouri

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