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Review government records associated with Somersworth, New Hampshire.
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Check your water bill for your utility name and confirm the reporting year. See EPA’s guide to finding your annual water quality report.
Public water-system records for Somersworth, NH from EPA SDWIS.
Somersworth Water Works
No active drinking-water issues detected in EPA SDWIS.
Reviewed: active/open records as of Q1 2026
City listed in EPA records · Serves 12,000 people
Data from EPA SDWIS
Reviewed: source records as of Q1 2026
EPA UCMR5 — No PFAS detection records shown for these water systems
Open data source: EPA UCMR5DoD PFAS — No investigation records shown for this report
Open data source: DoD PFASEPA ATTAINS records identify assessed water bodies that do not meet water-quality standards for designated uses.
Middle Salmon Falls River
Reported: Nov 2026
Health-relevant causes: Dioxins, Mercury, Pathogens, Polychlorinated Biphenyls (pcbs)
Affected uses: Ecological, Fishconsumption, Recreation
Data from EPA ATTAINS
NPDES permits regulate pollutant discharges into U.S. waterways. Facilities must report compliance quarterly.
Violation records
Last inspected: Dec 2025
Data from EPA ECHO
To investigate water contamination, check the sampling locations, dates and results below. For tap water records, see Drinking water quality above.
Reviewed: source records as of 2026
Review historical EPA air pollution records, including monitoring and facility emissions where available. For current conditions, check local air quality on AirNow.
Strafford County
Assessment year: 2020
According to EPA, a cancer risk of 20-in-1-million means that for every 1 million people continuously exposed to these air toxics over a 70-year lifetime, an estimated 20 may develop cancer from that exposure. This is in addition to cancer risk from all other causes.
Top modeled source groups
Data from EPA AirToxScreen
EPA designations apply to a specific pollutant and federal air quality standard (NAAQS). EPA can issue a clean-data determination while a formal designation remains in effect.
Historical designations under the revoked 1997 ozone standard
These records describe historical designations. EPA revoked the 1997 ozone standard on April 6, 2015.
Boston-Manchester-Portsmouth (Se) Area
Historical standard: 0.08 ppm (8-hour)
Historical designation: Maintenance · Subpart 2/Moderate
Original designation: Jun 2004
Open data source: EPA final revocation ruleContinuing requirements have not been verified for this area.
Data from EPA Green Book
EPA annual monitor summaries describe past measurements. For current air quality, see AirNow.
Kpw - Kennebunkport Parson'd Way
Annual mean: 0.039 Parts per million
EPA primary exceedance count: 3 (Ozone 8-hour 2015)
Observation year: 2025
Portsmouth - Peirce Island
Annual mean: 1.6 Parts per billion
Observation year: 2025
Annual mean: 0.039 Parts per million
EPA primary exceedance count: 2 (Ozone 8-hour 2015)
Observation year: 2025
Data from EPA AQS
Facilities regulated under the Clean Air Act. CAA HPV flags indicate serious noncompliance such as exceeding emission limits.
Air Violations
Last inspected: Dec 2025
Data from EPA ECHO
Reviewed: source records as of 2024
EPA records for current, proposed and formerly listed Superfund sites on the National Priorities List (NPL).
Open data source: Search EPA ECHOEPA FRS Registry ID 110009259505
Reported: Nov 2021
Brownfield sites are properties where redevelopment is complicated by the presence of hazardous substances.
Open data source: Search EPA ECHO1 site with active cleanup or investigation status
200 Main Street, Somersworth
Reported: Feb 2026
Facilities with hazardous-waste handler records under RCRA in the reviewed 5-mile city-center search area. Active handler status is separate from air, water, or other ECHO compliance violations, which are shown in their own sections.
Active RCRA handler records in the reviewed city search area
Release reports
Reported: Dec 2021
Reported: Dec 2021
Data from EPA UST Finder
Reviewed: reporting year 2024
Formerly Used Defense Sites are properties previously owned by, leased to, or otherwise possessed by the United States and under the jurisdiction of the Secretary of Defense. The FUDS program addresses environmental restoration at these properties.
Open data source: USACE FUDSSites regulated by the Mine Safety and Health Administration, including mines, sand and gravel operations, and portable crushers. Status and type are from the MSHA Mine Data Retrieval System. Records with active/intermittent status dates older than 5 years are shown as older records rather than current active sites.
Recently updated active/intermittent sites (1)
Data from MSHA
Strafford County, NH
EPA Radon Zone Map (June 2024 release)
Strafford County is EPA Radon Zone 2 (moderate potential). EPA defines Zone 2 counties as having predicted average indoor screening levels between 2 pCi/L and 4 pCi/L.
Radon levels can vary from home to home, so EPA recommends testing the property to know its indoor level.
FEMA flood zones describe mapped flood hazards. Look up a specific address with FEMA.
Special Flood Hazard Area — 1% annual chance of flooding (100-year floodplain). No base flood elevation determined.
Results use an earlier stored RMP inventory. Current EPA ECHO location coverage is unverified.
No EPA ECHO RMP facility records with a usable location matched this city report.
Health outcomes from County Health Rankings. Values shown alongside state and national averages.
Strafford County, New HampshirePop. 132,275
County Health Rankings edition: 2024
Premature Death
Poor or Fair Health
Poor Physical Health Days
Poor Mental Health Days
Adult Smoking
Adult Obesity
Air Pollution - Particulate Matter
Drinking water violation indicator
Diabetes Prevalence
Life Expectancy
| Indicator | County | State | National |
|---|---|---|---|
| Premature Death | 7,325 | 6,499 | 7,972 |
| Poor or Fair Health | 12.2% | 11.2% | 14.2% |
| Poor Physical Health Days | 3.3 | 3.0 | 3.3 |
| Poor Mental Health Days | 5.0 | 5.2 | 4.8 |
| Adult Smoking | 14.0% | 12.7% | 15.0% |
| Adult Obesity | 32.5% | 31.2% | 34.0% |
| Air Pollution - Particulate Matter | 6.2 | 5.3 | 7.3 |
| Drinking water violation indicator | Yes | N/A | N/A |
| Diabetes Prevalence | 8.9% | 7.3% | 9.6% |
| Life Expectancy | 77.7 | 79.2 | 77.6 |
This report does not have PFAS sample results for the candidate water systems in Somersworth.
Check with the utility that serves your address for its testing results.
The EPA drinking water records available here list no violations for Somersworth Water Works.
Check your water bill to identify the utility serving your address. Ask that utility about current drinking water advisories.
Nearby EPA monitoring stations provide annual air quality measurements for Somersworth.
The monitoring station at Kpw-Kennebunkport Parson'd Way recorded an annual average of 0.039 Parts per million for ozone in 2025.
The monitoring station at Portsmouth-Peirce Island recorded an annual average of 1.6 Parts per billion for sulfur dioxide in 2025.
The monitoring station at Portsmouth-Peirce Island recorded an annual average of 0.039 Parts per million for ozone in 2025.
The radon data for Somersworth covers Strafford County. EPA places this area in Zone 2, with a predicted average indoor radon screening level of 2 to 4 picocuries per liter.
This city report shows 1 Superfund site: Somersworth Sanitary Landfill.
This city report shows 3 brownfield sites: Breton Cleaners; Facemate Transformer; Former Facemate Corporation Mill Property.
View on EPA ECHOView on EPA ECHOView on EPA ECHOView on EPA ECHO
The county data for Somersworth reports a life expectancy of 77.7 years in Strafford County, New Hampshire.
The figure is from the 2024 edition of County Health Rankings, a University of Wisconsin program that publishes county health statistics.
The county data for Somersworth reports 7,325 years of life lost to deaths before age 75 per 100,000 residents in Strafford County, New Hampshire. This measure adds up the years lost to early deaths and adjusts for differences in population age.
The figure is from the 2024 edition of County Health Rankings, a University of Wisconsin program that publishes county health statistics.
The county data for Somersworth lists fine-particle pollution (PM2.5) at 6.2 micrograms per cubic meter in Strafford County, New Hampshire.
The figure is from the 2024 edition of County Health Rankings, a University of Wisconsin program that publishes county health statistics.