Exeter, NH · EPA ID NH0801010
Is Exeter Water Dept water safe?
👥12,236people served
⚠️16health-based violations since 2016
📋24total violations, all years
💧SWsurface water (lake, river or reservoir)
Quick answer
Exeter Water Dept has had 16 health-based violations since 2016 in EPA records, most recently Total trihalomethanes (TTHM, a disinfection byproduct) (Contaminant level above the legal limit) starting 2025-10-01. It serves about 12,236 people in Exeter, NH using surface water (lake, river or reservoir). Total violations on record (all years, including paperwork): 24. 1 are not yet marked resolved.
Record status (EPA health-based violations since 2016): ✓Clean record none · •Some issues 1–2, all resolved · !Repeated issues 3 or more · !Unresolved health issue one not yet marked resolved. Paperwork-only violations do not change the status. Details
System facts
| EPA system ID | NH0801010 |
|---|---|
| Population served | 12,236 |
| Service connections | 3,515 |
| Water source | surface water (lake, river or reservoir) |
| Owner type | local government |
| Town / county | Exeter, Rockingham County |
Violations since 2016, in plain words
- 16 × Contaminant level above the legal limit
- 1 × Monitoring or reporting missed
"Health-based" means a contaminant went over a legal limit or a required treatment step was missed. Monitoring and reporting violations mean a test or report was late or missing; they do not by themselves mean the water was unsafe.
Full violation history
| Began | What | Type | Health-based? | Status |
|---|---|---|---|---|
| 2025-10-01 | Total trihalomethanes (TTHM, a disinfection byproduct) | Contaminant level above the legal limit | Yes | Resolved 2026-04-14 |
| 2019-07-01 | Total trihalomethanes (TTHM, a disinfection byproduct) | Contaminant level above the legal limit | Yes | Resolved 2019-11-06 |
| 2019-04-01 | Total trihalomethanes (TTHM, a disinfection byproduct) | Contaminant level above the legal limit | Yes | Resolved 2019-11-06 |
| 2019-01-01 | Total trihalomethanes (TTHM, a disinfection byproduct) | Contaminant level above the legal limit | Yes | Resolved 2019-11-06 |
| 2018-10-01 | Total trihalomethanes (TTHM, a disinfection byproduct) | Contaminant level above the legal limit | Yes | Resolved 2019-11-06 |
| 2018-07-01 | Total trihalomethanes (TTHM, a disinfection byproduct) | Contaminant level above the legal limit | Yes | Resolved 2019-11-06 |
| 2018-04-01 | Total trihalomethanes (TTHM, a disinfection byproduct) | Contaminant level above the legal limit | Yes | Resolved 2019-11-06 |
| 2018-04-01 | Chlorine | Monitoring or reporting missed | No | Resolved 2018-08-06 |
| 2018-01-01 | Total trihalomethanes (TTHM, a disinfection byproduct) | Contaminant level above the legal limit | Yes | Resolved 2019-11-06 |
| 2017-10-01 | Total trihalomethanes (TTHM, a disinfection byproduct) | Contaminant level above the legal limit | Yes | Resolved 2019-11-06 |
| 2017-07-01 | Total trihalomethanes (TTHM, a disinfection byproduct) | Contaminant level above the legal limit | Yes | Resolved 2019-11-06 |
| 2017-04-01 | Total trihalomethanes (TTHM, a disinfection byproduct) | Contaminant level above the legal limit | Yes | Resolved 2019-11-06 |
| 2017-01-01 | Total trihalomethanes (TTHM, a disinfection byproduct) | Contaminant level above the legal limit | Yes | Resolved 2019-11-06 |
| 2016-10-01 | Total trihalomethanes (TTHM, a disinfection byproduct) | Contaminant level above the legal limit | Yes | Resolved 2019-11-06 |
| 2016-07-01 | Total trihalomethanes (TTHM, a disinfection byproduct) | Contaminant level above the legal limit | Yes | Resolved 2019-11-06 |
| 2016-04-01 | Total trihalomethanes (TTHM, a disinfection byproduct) | Contaminant level above the legal limit | Yes | Resolved 2019-11-06 |
| 2016-01-01 | Total trihalomethanes (TTHM, a disinfection byproduct) | Contaminant level above the legal limit | Yes | Resolved 2019-11-06 |
| 2015-10-01 | Total trihalomethanes (TTHM, a disinfection byproduct) | Contaminant level above the legal limit | Yes | Resolved 2019-11-06 |
| 2015-07-01 | Total trihalomethanes (TTHM, a disinfection byproduct) | Contaminant level above the legal limit | Yes | Resolved 2019-11-06 |
| 2015-04-01 | Total trihalomethanes (TTHM, a disinfection byproduct) | Contaminant level above the legal limit | Yes | Resolved 2019-11-06 |
| 2015-01-04 | Public notice rule | Notice or paperwork requirement missed | No | Open |
| 2015-01-01 | Total trihalomethanes (TTHM, a disinfection byproduct) | Contaminant level above the legal limit | Yes | Resolved 2019-11-06 |
| 2014-10-01 | Total trihalomethanes (TTHM, a disinfection byproduct) | Contaminant level above the legal limit | Yes | Resolved 2019-11-06 |
| 2014-07-01 | Total trihalomethanes (TTHM, a disinfection byproduct) | Contaminant level above the legal limit | Yes | Resolved 2019-11-06 |
What you can do
- Read the system's annual Consumer Confidence Report (water quality report); systems must mail or post it each year. You can also ask Exeter Water Dept for it directly.
- If your home was built before 1986, lead can come from your own pipes and fixtures even when the utility's water is fine. Run the tap 30 seconds to 2 minutes before drinking if water sat for hours, and use cold water for cooking.
- If you want extra protection, choose a filter certified to NSF/ANSI 53 (lead) or 58 (reverse osmosis); a simple carbon filter certified to NSF/ANSI 42 helps mainly with chlorine taste.
- Surface water systems use disinfection, which creates byproducts (TTHM, HAA5) that are tested regularly.
- On a private well? This system's results do not apply to you. NH DES recommends testing private wells every 3-5 years for a standard analysis.