Cincinnati Water Quality
Ohio
According to EPA SDWIS, Cincinnati, Ohio is served by 17 community water systems covering about 779,612 people. The same extract lists 15 health-based violation records, most recently coded 0400 in 2025. Counts are historical EPA registry rows, not a current compliance or drinkability score.
Drinking water in Cincinnati, Ohio is delivered through 17 EPA-regulated community water systems serving an estimated 779,612 people. Each system is tracked in the EPA Safe Drinking Water Information System (SDWIS) under the Safe Drinking Water Act, which requires testing for regulated contaminants, consumer notification of violations, and publication of an annual Consumer Confidence Report.
PlainEnviro's health-based SDWIS extract shows 15 violation records across the 17 active community systems shown here. Monitoring and reporting records are not present in the extract. The records carry 6 distinct EPA contaminant codes: Stage 1 Disinfectants and Disinfection Byproducts Rule, LEAD AND COPPER RULE REVISIONS, Total Haloacetic Acids (HAA5), TTHM, Revised Total Coliform Rule and 1 others. 88 TRI-reporting industrial facilities are also located within the city limits.
A past EPA health-based registry row does not describe water delivered today or current compliance status; utilities notify customers and remediate under state primacy oversight when required. For current water-quality status and treatment practices, review your local utility's most recent Consumer Confidence Report or contact the Ohio drinking water program. All records above reflect federal EPA SDWIS data and are not independently verified against state databases.
Community Water Systems
| System Name | Pop. Served | Violations | Status |
|---|---|---|---|
| CINCINNATI PUBLIC WATER SYSTEM | 750,200 | 0 | Clean |
| INDIAN HILL CITY PWS | 15,000 | 0 | Clean |
| WYOMING CITY PWS | 9,700 | 0 | Clean |
| TIMBERBROOK MOBILE HOME PARK | 1,418 | 2 | Health |
| BRIGHTSTAR LIMA MHP PWS | 480 | 0 | Clean |
| OAK BROOK ESTATES | 455 | 1 | Health |
| CHATEAU ESTATES MHP PWS | 430 | 1 | Health |
| WHISPERING PINES RV PARK | 308 | 0 | Clean |
| PINE GLEN MOBILE HOME PARK LLC, | 303 | 0 | Clean |
| QUAIL RUN MOBILE HOME ESTATES | 260 | 0 | Clean |
| HICKORY MANOR MOBILE HOME PARK | 250 | 7 | Health |
| HONEY CREEK VILLAGE MHP PWS | 225 | 1 | Health |
| WOODLAND HILLS MOBILE HOME PARK #2 | 168 | 0 | Clean |
| COUNTRY ACRES MOBILE HOME PARK | 150 | 2 | Health |
| WOODLAND HILLS MOBILE HOME PARK #1 | 100 | 0 | Clean |
| BRIGHTSTAR FREMONT MHP PWS | 100 | 1 | Health |
| BRIGHTSTAR FOSTORIA EAST MHP PWS | 65 | 0 | Clean |
Does this city have health-based water violations?
These health-based records can represent Maximum Contaminant Level (MCL), Treatment Technique (TT), or Maximum Residual Disinfectant Level (MRDL) categories. A historical record does not establish that water is currently unsafe.
| Water system | Contaminant | Begin Date |
|---|---|---|
| HONEY CREEK VILLAGE MHP PWS | Stage 1 Disinfectants and Disinfection Byproducts Rule | 2025-09-04 |
| CHATEAU ESTATES MHP PWS | Stage 1 Disinfectants and Disinfection Byproducts Rule | 2025-09-04 |
| BRIGHTSTAR FREMONT MHP PWS | LEAD AND COPPER RULE REVISIONS | 2024-10-17 |
| HICKORY MANOR MOBILE HOME PARK | LEAD AND COPPER RULE REVISIONS | 2024-10-17 |
| HICKORY MANOR MOBILE HOME PARK | LEAD AND COPPER RULE REVISIONS | 2024-10-17 |
| HICKORY MANOR MOBILE HOME PARK | Total Haloacetic Acids (HAA5) | 2019-01-01 |
| HICKORY MANOR MOBILE HOME PARK | Total Haloacetic Acids (HAA5) | 2018-10-01 |
| HICKORY MANOR MOBILE HOME PARK | Total Haloacetic Acids (HAA5) | 2017-10-01 |
| HICKORY MANOR MOBILE HOME PARK | TTHM | 2017-07-01 |
| HICKORY MANOR MOBILE HOME PARK | Total Haloacetic Acids (HAA5) | 2017-07-01 |
| OAK BROOK ESTATES | Revised Total Coliform Rule | 2016-09-21 |
| TIMBERBROOK MOBILE HOME PARK | Lead and Copper Rule | 2001-04-01 |
| COUNTRY ACRES MOBILE HOME PARK | Lead and Copper Rule | 2001-04-01 |
| TIMBERBROOK MOBILE HOME PARK | Lead and Copper Rule | 2001-01-01 |
| COUNTRY ACRES MOBILE HOME PARK | Lead and Copper Rule | 2001-01-01 |
What are Cincinnati's health-based records for?
Cincinnati's health-based violation records carry 6 distinct EPA codes: some name a substance, others the drinking-water rule that was breached. Counts are records on file in the EPA SDWIS extract, not current test results.
| Contaminant | Records | Systems |
|---|---|---|
| Lead and Copper Rule | 4 | 2 |
| Total Haloacetic Acids (HAA5) | 4 | 1 |
| Lead and Copper Rule Revisions | 3 | 2 |
| Stage 1 Disinfectants and Disinfection Byproducts Rule | 2 | 2 |
| Tthm | 1 | 1 |
| Revised Total Coliform Rule | 1 | 1 |
TRI Facilities in Cincinnati
| Facility | Total Releases |
|---|---|
| The Shepherd Color Co | 3.5M lbs |
| Environmental Enterprises Inc | 1.4M lbs |
| American Craft Brewery LLC | 1.1M lbs |
| Emery Oleochemicals LLC Cincinnati Plant | 1.0M lbs |
| Emd Millipore Corp | 491.9K lbs |
| Dystar Hilton Davis Corp | 445.5K lbs |
| Basf Corp | 326.6K lbs |
| Schlage Lock Co LLC | 318.4K lbs |
| Dubois Chemicals Inc. - Sharonville Oh (50) | 315.3K lbs |
| Micro Metal Finishing LLC | 254.8K lbs |
Frequently Asked Questions
What does EPA SDWIS list for drinking water in Cincinnati, Ohio? ▼
How many water violations does Cincinnati have in this EPA extract? ▼
What contaminants were found in Cincinnati water? ▼
How many water systems serve Cincinnati? ▼
Where does Cincinnati get its drinking water? ▼
Are there pollution sources near Cincinnati? ▼
How does Cincinnati compare in Ohio?
Of the 581 Ohio places with at least one community water system on file, Cincinnati ranks #4 by number of systems (17).
Either side of it: Columbus (19), Mansfield (19), Massillon (17), Franklin Furnace (13)
About This Data
Figures here are the current EPA SDWIS extract joined to the 17 community water systems whose service area lists Cincinnati, ranked against the 581 Ohio places with at least one system on file. Data current as of 2026-08-25.
Water system data comes from the EPA's Safe Drinking Water Information System (SDWIS). PlainEnviro's violation fetch is restricted upstream to records EPA flags as health-based and then joined to active community water systems. Monitoring and reporting violations are not included.
A health-based violation row in this extract is a historical EPA registry entry. It does not describe water delivered today or current compliance status. Many records are later resolved, and public water systems notify customers when required. For current conditions, contact your local water utility or the state drinking water program.
TRI facility data comes from the EPA Toxic Release Inventory. Facilities shown are those that self-report to the TRI program. PlainEnviro presents this data without advocacy framing.
Read our methodology - how this data is sourced, computed, and verified.