Consumer Confidence Rule (CCR) violations in Ohio
751 active public water systems in Ohio had a Consumer Confidence Rule (CCR) violation in the past three years, 751 of them in the latest quarter of EPA's data. What Consumer Confidence Rule (CCR) is and why it matters.
Systems with a Consumer Confidence Rule (CCR) violation
Latest quarter first, then largest first| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Clermont Public Water System Clermont County |
133,059 | 1 | 1 | |
|
Canton Public Water System Stark County |
107,113 | 1 | 1 | |
|
Warren County Warren County |
99,000 | 1 | 1 | |
|
Aqua Ohio Massillon PWS Stark County |
95,636 | 1 | 1 | |
|
Lorain City PWS Lorain County |
64,152 | 2 | 1 | |
|
Hamilton Public Water System Butler County |
62,447 | 2 | 1 | |
|
Springfield City PWS Clark County |
60,680 | 1 | 1 | |
|
Aqua Ohio Struthers Mahoning County |
58,551 | 1 | 1 | |
|
Findlay City PWS Hancock County |
54,040 | 1 | 1 | |
|
Middletown City PWS Butler County |
51,229 | 2 | 1 | |
|
Cuyahoga Falls City PWS Summit County |
51,114 | 2 | 1 | |
|
Newark City PWS Licking County |
49,934 | 2 | 1 | |
|
Medina Co/northwest PWS Medina County |
46,324 | 2 | 2 | |
|
Huber Heights Public Water System Montgomery County |
43,439 | 1 | 1 | |
|
Greene Co.-Northwest Reg Water Greene County |
41,895 | 1 | 0 | |
|
Portsmouth City Scioto County |
40,475 | 2 | 1 | |
|
Lancaster City PWS Fairfield County |
40,400 | 1 | 1 | |
|
Western Water Company Warren County |
39,508 | 1 | 1 | |
|
Reynoldsburg City PWS Franklin County |
37,847 | 1 | 1 | |
|
North Ridgeville City PWS Lorain County |
37,786 | 2 | 1 | |
|
Stow Public Water System Summit County |
35,437 | 2 | 1 | |
|
Fairborn Public Water System Greene County |
34,620 | 1 | 0 | |
|
Athens PWS Athens County |
32,725 | 1 | 1 | |
|
Aqua Ohio Ashtabula Ashtabula County |
32,342 | 1 | 1 | |
|
Painesville City PWS Lake County |
31,728 | 1 | 1 | |
|
Nawa Miami County |
29,974 | 1 | 1 | |
|
Belmont Co. Sanitary District 3 PWS Belmont County |
26,822 | 3 | 1 | |
|
Wooster City PWS Wayne County |
26,618 | 1 | 1 | |
|
Marysville City PWS Union County |
25,571 | 2 | 1 | |
|
Wadsworth City PWS Medina County |
24,356 | 1 | 1 | |
|
Tate-Monroe Water Association PWS Clermont County |
24,092 | 1 | 1 | |
|
Avon City PWS Lorain County |
24,060 | 1 | 1 | |
|
Niles City PWS Trumbull County |
21,961 | 1 | 1 | |
|
Chillicothe City PWS Ross County |
21,725 | 2 | 1 | |
|
Sylvania City Lucas County |
21,618 | 2 | 1 | |
|
Gallia CO Rural Water Association Gallia County |
20,995 | 1 | 1 | |
|
Ashland City Ashland County |
20,648 | 2 | 1 | |
|
Sidney City PWS Shelby County |
20,614 | 2 | 1 | |
|
Piqua City PWS Miami County |
20,354 | 2 | 2 | |
|
Aqua Ohio Tiffin Seneca County |
20,279 | 1 | 1 | |
|
Norwood City PWS Hamilton County |
19,870 | 1 | 1 | |
|
Miamisburg City PWS Montgomery County |
19,790 | 1 | 1 | |
|
Northwestern W and SD Toledo Svc Area Wood County |
19,332 | 2 | 1 | |
|
Le-Ax Regional Water District PWS Athens County |
19,311 | 1 | 1 | |
|
Pickerington City PWS Fairfield County |
19,141 | 1 | 1 | |
|
Berea City PWS Cuyahoga County |
18,789 | 1 | 1 | |
|
Marietta City PWS Washington County |
18,707 | 2 | 1 | |
|
Tallmadge City PWS Summit County |
18,394 | 1 | 1 | |
|
Fremont City Sandusky County |
18,319 | 2 | 1 | |
|
Northern Ohio Rural Water Huron County |
18,224 | 1 | 1 |
About this data
A system is counted once if any of its violations in the past three years involved Consumer Confidence Rule (CCR), including monitoring and reporting lapses. Rules violated and status in the table are for the whole system, not Consumer Confidence Rule (CCR) alone.
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.