TWIN CITY WATER AND SEWER DISTRICT PWS
PWS ID: OH7901711 · DENNISON, Ohio 44621
Population Served
9,224
Total Violations
185
Health-Based Violations
51
Water Source
Groundwater
System Details
- System Type
- Community
- Owner Type
- Local
- Connections
- 3,600
- County
- Tuscarawas
- School/Daycare
- No
- MCL Violations
- 0
- Monitoring Violations
- 109
- Treatment Tech Violations
- 51
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Surface Water Treatment Rule | TT | 51 | 1994 |
| Surface Water Treatment Rule | MR | 39 | 2008 |
| Arsenic | MR | 6 | 1991 |
| Cadmium | MR | 6 | 1991 |
| Chromium | MR | 6 | 1991 |
| Nitrate | MR | 6 | 1991 |
| Selenium | MR | 6 | 1991 |
| Interim Enhanced Surface Water Treatment Rule | MR | 6 | 2005 |
| TTHM | MR | 6 | 2013 |
| Total Haloacetic Acids (HAA5) | MR | 6 | 2013 |
| Barium | MR | 6 | 1991 |
| Fluoride | MR | 6 | 1991 |
| Mercury | MR | 6 | 1991 |
| CARBON, TOTAL | MR | 4 | 2005 |
| Consumer Confidence Rule | Other | 3 | 2020 |
PFAS Testing Results (UCMR5)
Results from EPA's Fifth Unregulated Contaminant Monitoring Rule. 0 of 60 samples detected PFAS.
| Contaminant | Date | Result | MRL | Status |
|---|---|---|---|---|
| 8:2 FTS | 4/17/2023 | <0.005 µg/L | 0.005 µg/L | Not Detected |
| PFHpA | 4/17/2023 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFHxS | 4/17/2023 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFNA | 4/17/2023 | <0.004 µg/L | 0.004 µg/L | Not Detected |
| PFOS | 4/17/2023 | <0.004 µg/L | 0.004 µg/L | Not Detected |
| PFOA | 4/17/2023 | <0.004 µg/L | 0.004 µg/L | Not Detected |
| PFDA | 4/17/2023 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFDoA | 4/17/2023 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFHxA | 4/17/2023 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFUnA | 4/17/2023 | <0.002 µg/L | 0.002 µg/L | Not Detected |
| 11Cl-PF3OUdS | 4/17/2023 | <0.005 µg/L | 0.005 µg/L | Not Detected |
| 9Cl-PF3ONS | 4/17/2023 | <0.002 µg/L | 0.002 µg/L | Not Detected |
| HFPO-DA | 4/17/2023 | <0.005 µg/L | 0.005 µg/L | Not Detected |
| PFBS | 4/17/2023 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| 4:2 FTS | 4/17/2023 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| ADONA | 4/17/2023 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFMPA | 4/17/2023 | <0.004 µg/L | 0.004 µg/L | Not Detected |
| PFPeA | 4/17/2023 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFMBA | 4/17/2023 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFEESA | 4/17/2023 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| NFDHA | 4/17/2023 | <0.02 µg/L | 0.02 µg/L | Not Detected |
| PFPeS | 4/17/2023 | <0.004 µg/L | 0.004 µg/L | Not Detected |
| PFHpS | 4/17/2023 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFTA | 4/17/2023 | <0.008 µg/L | 0.008 µg/L | Not Detected |
| PFTrDA | 4/17/2023 | <0.007 µg/L | 0.007 µg/L | Not Detected |
| NEtFOSAA | 4/17/2023 | <0.005 µg/L | 0.005 µg/L | Not Detected |
| NMeFOSAA | 4/17/2023 | <0.006 µg/L | 0.006 µg/L | Not Detected |
| 6:2 FTS | 4/17/2023 | <0.005 µg/L | 0.005 µg/L | Not Detected |
| lithium | 4/17/2023 | <9 µg/L | 9 µg/L | Not Detected |
| PFBA | 4/17/2023 | <0.005 µg/L | 0.005 µg/L | Not Detected |
| PFOS | 10/9/2023 | <0.004 µg/L | 0.004 µg/L | Not Detected |
| 9Cl-PF3ONS | 10/9/2023 | <0.002 µg/L | 0.002 µg/L | Not Detected |
| 11Cl-PF3OUdS | 10/9/2023 | <0.005 µg/L | 0.005 µg/L | Not Detected |
| PFUnA | 10/9/2023 | <0.002 µg/L | 0.002 µg/L | Not Detected |
| PFHxA | 10/9/2023 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFDoA | 10/9/2023 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| ADONA | 10/9/2023 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFOA | 10/9/2023 | <0.004 µg/L | 0.004 µg/L | Not Detected |
| PFHpA | 10/9/2023 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFNA | 10/9/2023 | <0.004 µg/L | 0.004 µg/L | Not Detected |
| PFHxS | 10/9/2023 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFTrDA | 10/9/2023 | <0.007 µg/L | 0.007 µg/L | Not Detected |
| PFBS | 10/9/2023 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFDA | 10/9/2023 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFTA | 10/9/2023 | <0.008 µg/L | 0.008 µg/L | Not Detected |
| lithium | 10/9/2023 | <9 µg/L | 9 µg/L | Not Detected |
| HFPO-DA | 10/9/2023 | <0.005 µg/L | 0.005 µg/L | Not Detected |
| NMeFOSAA | 10/9/2023 | <0.006 µg/L | 0.006 µg/L | Not Detected |
| PFHpS | 10/9/2023 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFPeS | 10/9/2023 | <0.004 µg/L | 0.004 µg/L | Not Detected |
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025.
PFAS data from EPA UCMR5 monitoring program (2023-2025).
This data is provided for informational purposes only.