County drinking water records
Cerro Gordo County, IA drinking water systems
9 community water systems serve Cerro Gordo County, IA, reporting 38,006 people served in all.
None of them had a health-based violation in the last 10 years.
9 rely mainly on groundwater, counting water bought from other systems.
Their lead service line inventories list 2,345 lead lines, 262 galvanized lines that must be replaced and 2,017 lines of unknown material.
- Community water systems
- 9
- People served, sum of each system's own figure
- 38,006
- Systems with a health-based violation, last 10 years
- 0
- Systems with one unresolved
- 1
- Lead service lines in inventories
- 2,345
Water systems serving Cerro Gordo County
9 systemsPeople 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 |
|---|---|---|---|---|---|---|
| Mason City Water Department | Mason City | 27,338 | Groundwater | 0 | 0 | 2,322 |
| Clear Lake Water Department | Clear Lake and Ventura | 7,687 | Groundwater | 0 | 0 | 13 |
| Rockwell Water Supply | Rockwell | 1,071 | Groundwater | 0 | 0 | 0 |
| Ventura Water Works | Ventura | 716 | Groundwater | 0 | 0 | 0 |
| Thornton Water Supply | Thornton | 400 | Groundwater | 0 | 0 | 9 |
| Plymouth Water Supply | Plymouth | 378 | Groundwater | 0 | 1 | 0 |
| Meservey Water Supply | Meservey | 222 | Groundwater | 0 | 0 | 1 |
| Swaledale Water Supply | Swaledale | 144 | Groundwater | 0 | 0 | 0 |
| Long Beach Mobile Park | Clear Lake and land outside it | 50 | Groundwater | 0 | 0 | 0 |
Cities and towns in Cerro Gordo County
8 places- Clear Lake1 system
- Mason City1 system
- Meservey1 system
- Plymouth1 system
- Rockwell1 system
- Swaledale1 system
- Thornton1 system
- Ventura2 systems
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