How many water violations are in Logan County?

Logan County has 7,646 total drinking water violations across 135 water systems, of which 1,568 are health-based violations. 87.4% of systems have at least one violation.

How many people get water from Logan County systems?

Water systems in Logan County serve approximately 44,127 people through 135 public water systems.

Has PFAS been detected in Logan County water?

Under EPA UCMR5, 1 of 2 tested systems in Logan County had at least one PFAS detection (50.0% of the UCMR5-tested subset - not of all 135 SDWIS systems).

What types of water sources supply Logan County?

Water systems in Logan County use GW (135 systems) as their primary water sources.

Are health-based violations serious?

Health-based violations indicate that drinking water exceeded Maximum Contaminant Levels (MCLs) set by the EPA or failed treatment technique requirements. 20.5% of Logan County's violations are health-based. Among counties with any SDWIS violations, this extract puts Logan County in the middle health-based share band. Not all violations indicate immediate health risk, but they require corrective action.

Where does Logan County sit among U.S. counties for water-system population?

According to EPA SDWIS county population served used on /counties, Logan County ranks #1,039 of 3,254 counties by people served, and #47 of 88 counties in Ohio. Ordinals use the same total_population DESC sort as the counties directory. See /methodology#corpus-placement.

Counties → Ohio

Logan County, Ohio

Compiled by PlainWater · May 15, 2026

SDWIS compliance plate

Sheet OH091 · Logan County 135 sys · 7,646 viol · #1039/3254

VIOL-SEVERE · HEALTH-MID · RANK-UPPER · PHOTO-FINISH · PFAS-HIGH · SRC-GW · SYS-LARGE · BOOK-FULL

VIOL-SEVERE 87.4% flagged
HEALTH-MID 20.5% health
RANK-UPPER #1039/3254
PHOTO-FINISH ±0.3 pp
PFAS-HIGH 50.0% detect
SRC-GW GW lead 100%
SYS-LARGE 135 systems
BOOK-FULL 7/7 fields

Nearest flagged-rate peer: Auglaize County ( -0.3 pp flagged-rate)

According to EPA SDWIS county population served used on /counties, Logan County ranks #1,039 of 3,254 counties by people served, and #47 of 88 counties in Ohio. See methodology · corpus placement.

Logan County standing, lower-flagged corpus third

Flagged-system rate 87.4% is at or below the corpus lower third (≤ 92.7% flagged) across 2,973 counties with ≥3 SDWIS systems . Health-based share 20.5% is health-based share in the middle third (≤ 24.5%) . UCMR5 detect rate 50.0% is UCMR5 detect rate above the tested-pool upper third (> 33.3%) . Population served ranks #1,039 of 3,254 · #47 of 88 in Ohio.

Water Systems

System Name	Population	Violations	PFAS
Bellefontaine City PWS	13,249	345	Detected
Honda Dma East Liberty WTP	3,500	256	Clean
Mad River Mountain	2,014	59	-
West Liberty Village PWS	1,800	41	-
Russells Point Village PWS	1,651	153	-
Honda Dma Trans Manufacturing OH Div	1,600	20	-
Odnr Indian Lake St Pk - Campground	1,491	51	-
Degraff Village PWS	1,215	6	-
Lakeview Village PWS	1,083	37	-
Belle Center Village PWS	834	7	-
Huntsville Marastop PWS	712	26	-
West Mansfield Village PWS	700	102	-
Ben Logan Elementary School	697	10	-
Ben Logan Middle School	671	5	-
Ben Logan High School	603	10	-
Quincy Village PWS	600	183	-
Rushsylvania Village PWS	551	76	-
Christ Our King PWS	450	7	-
Kamp-A-Lott	341	71	-
Mountainview Mobile Village	300	253	-
Mt Tabor Church	300	0	-
Logan Landing PWS	268	29	-
Lakeview Marathon	253	101	-
YMCA Willson Center-Dining PWS	242	13	-
Winner's Lakeview Market	240	0	-
Parkside Campground PWS	240	0	-
Froggys at the Lake	225	57	-
Dollar General #21022-Belle Center	220	0	-
The Cornerstone Church at Huntsville	210	36	-
Cherokee Hills Golf Course	200	41	-
Community Health & Wellness Partners	200	33	-
Smuggler's Cove RV Park	191	0	-
Camp Cotubic	180	21	-
Midwest Express 2Cde PWS	180	43	-
Indian Trails Resort	170	18	-
Cim Group East Liberty	160	11	-
Wengers Produce	156	0	-
Oak Crest Camp	150	37	-
Oakdale Camp	150	24	-
Liberty Hills Golf Club	150	11	-
Midwest Express 2I PWS	150	0	-
Middleburg United Methodist Church	140	56	-
Transportation Research Center PWS	140	119	-
Frostys RV Park and Campground PWS	140	12	-
Flip Flop Cove Campground	138	16	-
Islander Boatel Condo	130	39	-
Goshen Friends Church	125	69	-
Nx Automotive Logistics Bldg 2 PWS	125	2	-
River Run Harbor PWS	125	0	-
Marmon Valley Farm	120	151	-

Compare beyond Ohio

Lower-flagged peers for Logan County

Cross-state counties nearest Logan County on flagged-system share (87.4%) and cumulative violation count (7,646). 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.

4 peers

Similar violation load

Nearest cross-state counties by cumulative SDWIS violation count (all systems in the county).

4 peers

Read our methodology · Check your water system - how this data is sourced, computed, and verified.

Data sourced from EPA SDWIS and UCMR5 PFAS monitoring data. See our methodology for details. Retrieved and formatted by PlainWater

Compiled by PlainWater, Drinking Water Quality Editorial Process · May 15, 2026

Every figure on PlainWater is rendered directly from EPA SDWIS drinking-water data, no number is typed in by an editor. This page draws directly on EPA SDWIS data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.