Water quality for ZIP code 45423
ZIP 45423 covers Dayton in Montgomery County, Ohio, one of 32 ZIP codes in the county. 71 active public water systems serve the county; 46 had an EPA violation in the past three years.
Most likely your provider
Other community water systems in Montgomery County
22 systems, largest first| System | Serves | Status | Rules violated, 3 yr |
|---|---|---|---|
| Dayton Public Water System |
141,407 | 0 | |
| Montgomery County Water Services 2 PWS |
83,033 | 0 | |
| Huber Heights Public Water System |
43,439 | 1 | |
| Miamisburg City PWS |
19,790 | 1 | |
| Englewood City PWS |
13,463 | 0 | |
| Oakwood City PWS |
9,572 | 0 | |
| Trotwood City PWS |
9,000 | 2 | |
| West Carrollton City PWS |
8,361 | 1 | |
| Union City PWS |
7,000 | 1 | |
| Brookville Municipality PWS |
5,923 | 2 | |
| Germantown City PWS |
5,547 | 1 | |
| Jefferson Regional Water Authority |
4,813 | 1 | |
| New Lebanon Village PWS |
3,770 | 1 | |
| Oakwood Village MHP |
1,500 | 3 | |
| Farmersville Village PWS |
975 | 1 | |
| Phillipsburg Village PWS |
490 | 2 | |
| Voyager Village MHP |
400 | 2 | |
| Brookville Lake Estates |
211 | 1 | |
| Quarry Lakes MHP LLC |
141 | 3 | |
| Dayton VA Bldg 410 |
125 | 2 | |
| Dayton VA Bldg 320 Pod a |
95 | 2 | |
| Sherwood Grove MHP |
30 | 1 |
Non-community systems in Montgomery County (48: schools, campgrounds, workplaces, restaurants)
These systems serve places you visit rather than homes.
About this data
Water systems are matched to Montgomery County, the county this ZIP code lies in, largest first. Your exact provider depends on your address and connection; the largest community water system in a county is usually the city or town utility.
ZIP code areas and town boundaries come from the U.S. Census Bureau's 2020 ZCTA files.
Source: the U.S. EPA's Enforcement and Compliance History Online system (ECHO), which publishes the federal Safe Drinking Water Information System. EPA's terms and values are shown as published. The Ohio records are from EPA's data refresh of Oct 7, 2026; EPA refreshes this data quarterly, and states report to EPA with a lag of three to six months, so the newest violations may not appear yet. Retrieved from ECHO on Oct 11, 2026.