Water system
Little Walnut Water Treatment Facility
EPA ID OH2303212 · Fairfield County · 1,428 people served
Little Walnut Water Treatment Facility treats its own water from Groundwater wells (2 wells).
The system's record
- Active wells
- 2
- Serves
- 1,428 people · Fairfield County
- EPA ID
- OH2303212
About this area's water
Water quality & impurities
EPA compliance record
Lead at the tap: 90th-percentile result 0 ppb in 2025 (action level 15 ppb).
EPA record: no health-based violations since 2015.
Present in 1 ZIP code
Serves
No ZIP code has Little Walnut Water Treatment Facility on record as its main water supplier.
Also present in 1 more ZIP code
- 43112 · Bloom Township and Carroll1% of residents
Population-weighted resident shares; a ZIP code can have more than one system on record. Recomputed from each ZIP's own system list, not from the map's cached footprint.
Buys from · Sells to
Little Walnut Water Treatment Facility does not buy water from another system on record; it treats its own source water.
1 system on record buys water from Little Walnut Water Treatment Facility: Carroll Village.
On the map
Show this system's territory on the map — 1 ZIP code in all.
Sources
U.S. EPA SDWIS and Community Water System Service Area Boundaries (v3, 2026), Ohio EPA primacy data, 2020 census blocks: the system serving most residents, traced through purchases to the treating utility; Ohio EPA 2023 Sewer and Water Rate Survey (Ohio State, May 2025) for household bills; Ohio EPA DEFA loan awards since 2016 for the loans paragraph · EPA SDWIS · EPA service area boundaries · Ohio EPA drinking water · Ohio EPA rate survey