County profile · EPA SDWIS + UCMR5
Butler County, Ohio
22 SDWIS-listed public water systems serve 378,755 people in Butler County. Violation rates use that full inventory; PFAS rates use only the UCMR5-tested subset.
- 22
- SDWIS water systems Middle third of counties
- 1,035
- Total violations Middle third of counties
- 81.8%
- SDWIS systems w/ a violation Lower third of counties
- 77.8%
- UCMR5 PFAS rate (9 tested) Upper third of counties with tests
SDWIS compliance plate
Sheet OH017 · Butler County 22 sys · 1,035 viol · #191/3254
VIOL-SEVERE · HEALTH-LOW · RANK-TOP · PHOTO-FINISH · PFAS-HIGH · SRC-GW · SYS-SMALL · BOOK-FULL
- VIOL-SEVERE 81.8% flagged
- HEALTH-LOW 17.9% health
- RANK-TOP #191/3254
- PHOTO-FINISH ±0.0 pp
- PFAS-HIGH 77.8% detect
- SRC-GW GW lead 86%
- SYS-SMALL 22 systems
- BOOK-FULL 7/7 fields
Nearest flagged-rate peer: Marion County (+ 0 pp flagged-rate)
According to EPA SDWIS county population served used on /counties, Butler County ranks #191 of 3,254 counties by people served, and #7 of 88 counties in Ohio. See methodology · corpus placement.
Butler County standing, lower-flagged corpus third
Flagged-system rate 81.8% is at or below the corpus lower third (≤ 92.7% flagged) across 2,973 counties with ≥3 SDWIS systems . Health-based share 17.9% is health-based share in the middle third (≤ 24.5%) . UCMR5 detect rate 77.8% is UCMR5 detect rate above the tested-pool upper third (> 33.3%) . Population served ranks #191 of 3,254 · #7 of 88 in Ohio.
Flagged-rate neighbourhood around Butler County
Lowest/highest poles plus in-state counties nearest Butler County on % of SDWIS systems with ≥1 violation. Full ladder: /counties.
Water Systems
| System Name | Population | Violations | PFAS |
|---|---|---|---|
| Butler Co. Water District 2 PWS | 116,572 | 27 | Detected |
| Hamilton Public Water System | 62,447 | 63 | Detected |
| Middletown City PWS | 51,229 | 61 | Detected |
| Fairfield City PWS | 44,907 | 14 | Detected |
| Southwest Regional Water District | 42,856 | 0 | Detected |
| Oxford City PWS | 24,000 | 21 | Detected |
| Monroe City PWS | 15,600 | 114 | Clean |
| Trenton City PWS | 13,012 | 87 | Detected |
| New Miami Village PWS | 3,200 | 114 | Clean |
| Catalina Mobile Home Park | 1,280 | 35 | - |
| Seven Mile Village PWS | 1,000 | 11 | - |
| Fort Hamilton Hospital PWS | 950 | 8 | - |
| Molson Coors USA LLC | 550 | 8 | - |
| Cincinnati Childrens Hospt Liberty PWS | 313 | 0 | - |
| Crouse Mobile Home Park & Sales, LLC | 247 | 92 | - |
| Advanced Drainage Systems- Butler | 171 | 0 | - |
| Linda Mobile Home Park PWS | 166 | 230 | - |
| AL Couch Super Market | 100 | 16 | - |
| Soul Winners Church | 75 | 106 | - |
| Naws Club LLC | 30 | 0 | - |
| Champion Camping Club PWS | 25 | 27 | - |
| Dollar General #16484 - Seven Mile PWS | 25 | 1 | - |
Compare beyond Ohio
Lower-flagged peers for Butler County
Cross-state counties nearest Butler County on flagged-system share (81.8%) and cumulative violation count (1,035). In-state neighbours stay on the compliance plate above.
Similar flagged-system rate
Nearest cross-state counties by % of SDWIS systems with at least one violation on record.
Similar violation load
Nearest cross-state counties by cumulative SDWIS violation count (all systems in the county).
Read our methodology · Check your water system - how this data is sourced, computed, and verified.
Every figure on PlainWater is rendered directly from EPA SDWIS drinking-water data, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.