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Review government records associated with Portsmouth, New Hampshire.
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Preparing Portsmouth environmental records...
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 Portsmouth, NH from EPA SDWIS.
Portsmouth Water Works
PFAS above an official threshold detected in available EPA records.
Reviewed: active/open records as of Q1 2026
City listed in EPA records · Serves 33,000 people
Data from EPA SDWIS
PFAS screening separates EPA UCMR5 drinking-water monitoring from nearby DoD PFAS investigation-site records; EPA samples shown are from Jul 2023 to Feb 2024.
Drinking Water PFAS Monitoring
EPA UCMR5 samples public water systems. These results are separate from nearby PFAS cleanup or investigation-site records.
5 PFAS sample results above EPA limits
Sample period: Jul 2023 to Feb 2024
UCMR5 results are sampled by public water system, not every household. Confirm your water provider before treating these as tap-water results for a specific address.
| Chemical | Concentration (µg/L) | EPA Limit (µg/L) | Sample date | Over Limit |
|---|---|---|---|---|
| PFOA | 0.0070 | 0.0040 | 2024-02-07 | Yes |
| PFOA | 0.0060 | 0.0040 | 2023-07-18 | Yes |
| PFOS | 0.0050 | 0.0040 | 2024-02-07 | Yes |
| PFOA | 0.0050 | 0.0040 | 2024-02-07 | Yes |
| PFOA | 0.0050 | 0.0040 | 2023-07-18 | Yes |
PFAS detections below EPA limits.
Nearby PFAS Investigation Sites
DoD records are nearby site investigations, not Portsmouth drinking-water detections. Record names come from the source database and can be broad.
Pease Afb
Air Force · BRAC
Known detection in the DoD source record
Remedial investigation underway
Agricultural notifications (2023-2024): 2
Estimated investigation end date: 2031-09
EPA ATTAINS records identify assessed water bodies that do not meet water-quality standards for designated uses.
Portsmouth Harbor
Reported: Nov 2026
Health-relevant causes: Dioxins, Mercury, Metals (other Than Mercury), Pathogens, Pesticides, Polychlorinated Biphenyls (pcbs), Toxic Organics
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
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.
Rockingham County
Assessment year: 2020
According to EPA, a cancer risk of 30-in-1-million means that for every 1 million people continuously exposed to these air toxics over a 70-year lifetime, an estimated 30 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
Last inspected: Dec 2025
Data from EPA ECHO
TRI releases are self-reported annual totals (calendar year 2024). Hover fugitive or stack for definitions.
Essential Power Newington
Reported: 2024
Georgia-Pacific Gypsum LLC Newington Nh
Reported: 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 110060391491
Reported: Nov 2021
EPA FRS Registry ID 110040852459
Reported: Apr 2024
Brownfield sites are properties where redevelopment is complicated by the presence of hazardous substances.
Open data source: Search EPA ECHO2 sites with active cleanup or investigation status
930 Route 1 Bypass North, Portsmouth
Reported: Feb 2026
55 Rock Street, Portsmouth
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
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 FUDSNo MSHA mine or extraction site records shown for this report.
Rockingham County, NH
EPA Radon Zone Map (June 2024 release)
Rockingham 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.
No FEMA flood-zone records shown for this report.
Results use an earlier stored RMP inventory. Current EPA ECHO location coverage is unverified.
EPA ECHO lists facilities linked to the Risk Management Program. Results include facilities with locations that can be matched. Records may be historical. Current operations, chemical inventories, and recent accident history are unverified.
Reviewed: 2000-present
Health outcomes from County Health Rankings. Values shown alongside state and national averages.
Rockingham County, New HampshirePop. 319,424
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 | 5,079 | 6,499 | 7,972 |
| Poor or Fair Health | 10.5% | 11.2% | 14.2% |
| Poor Physical Health Days | 2.9 | 3.0 | 3.3 |
| Poor Mental Health Days | 4.6 | 5.2 | 4.8 |
| Adult Smoking | 12.9% | 12.7% | 15.0% |
| Adult Obesity | 28.5% | 31.2% | 34.0% |
| Air Pollution - Particulate Matter | 5.9 | 5.3 | 7.3 |
| Drinking water violation indicator | Yes | N/A | N/A |
| Diabetes Prevalence | 6.9% | 7.3% | 9.6% |
| Life Expectancy | 80.5 | 79.2 | 77.6 |
EPA testing found PFAS in water samples from Portsmouth Water Works. Results dated Jul 18, 2023 to Feb 7, 2024 include PFBS at 0.003 to 0.009 micrograms per liter and PFOA at 0.004 to 0.007 micrograms per liter.
Check with the utility that serves your address for its testing results.
The EPA drinking water records available here list no violations for Portsmouth 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 Portsmouth.
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 Portsmouth covers Rockingham 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 2 Superfund sites: Pease Air Force Base; Portsmouth Naval Shipyard.
This city report shows 2 brownfield sites: New Hampshire Motorcycle; Rock Street Garage.
View on EPA ECHOView on EPA ECHOView on EPA ECHOView on EPA ECHO
The county data for Portsmouth reports a life expectancy of 80.5 years in Rockingham 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 Portsmouth reports 5,079 years of life lost to deaths before age 75 per 100,000 residents in Rockingham 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 Portsmouth lists fine-particle pollution (PM2.5) at 5.9 micrograms per cubic meter in Rockingham County, New Hampshire.
The figure is from the 2024 edition of County Health Rankings, a University of Wisconsin program that publishes county health statistics.