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Review government records associated with Chelsea, Massachusetts.
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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 Chelsea, MA from EPA SDWIS.
Chelsea Water Dept. (Mwra)
Active health-based drinking-water issue detected in EPA SDWIS.
Reviewed: active/open records as of Q1 2026
Purchased or imported water record · Serves 38,319 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.
Mystic River-Frontal Boston Harbor
Reported: Nov 2026
Health-relevant causes: Metals (other Than Mercury), Pathogens, Pesticides, Polychlorinated Biphenyls (pcbs)
Affected uses: Ecological, Fishconsumption, Other, Recreation
Data from EPA ATTAINS
NPDES permits regulate pollutant discharges into U.S. waterways. Facilities must report compliance quarterly.
No NPDES-permitted facility records with current violation flags surfaced for this city report.
Reviewed: active/open records as of Q4 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.
Suffolk 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 designates an area as nonattainment when air quality does not meet federal health-based standards (NAAQS) for a specific pollutant.
Maintenance areas
Previously nonattainment; currently meeting the standard and monitored under an EPA maintenance plan.
Boston Area
CO · Carbon Monoxide (1971 Standard)
Classification: Moderate <= 12.7ppm
Original designation: Nov 1990
Current design value: 1.6 ppm (2023-2025)
Historical designations under the revoked 1997 ozone standard
These records describe historical designations. EPA revoked the 1997 ozone standard on April 6, 2015.
Boston-Lawrence-Worcester (E. Mass) Area
Historical standard: 0.08 ppm (8-hour)
Historical designation: Nonattainment · 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.
25-009-2007 — Saugus (Town of), Massachusetts
Annual mean: 9.4 Micrograms/cubic meter (25 C)
Observation year: 2025
Annual mean: 5.9 Micrograms/cubic meter (LC)
Observation year: 2025
25-017-0011 — Framingham, Massachusetts
Annual mean: 6.1 Micrograms/cubic meter (LC)
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.
Chelsea Sandwich LLC
Reported: 2024
Dampney Co Inc
Reported: 2024
Duncan Galvanizing Corp.
Reported: 2024
Reviewed: source query run Nov 2026
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
203 Everett Avenue, Chelsea
Reported: Feb 2026
41 43 Orange St, Chelsea
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
No release reports shown in this group.
Reviewed: active/open records as of 2018
Data from EPA UST Finder
Reviewed: reporting year 2024
No MSHA mine or extraction site records shown for this report.
Suffolk County, MA
EPA Radon Zone Map (June 2024 release)
Suffolk County is EPA Radon Zone 3 (low potential). EPA defines Zone 3 counties as having predicted average indoor screening levels below 2 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) with base flood elevation.
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.
PHMSA tracks incidents involving natural gas and hazardous liquid pipelines. Incidents include leaks, ruptures, and explosions.
No records dated within the last 5 years surfaced for this city report.
Reviewed: last 5 years
Data from PHMSA
Health outcomes from County Health Rankings. Values shown alongside state and national averages.
Suffolk County, MassachusettsPop. 766,381
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 | 5,918 | 5,856 | 7,972 |
| Poor or Fair Health | 14.8% | 11.4% | 14.2% |
| Poor Physical Health Days | 3.1 | 2.7 | 3.3 |
| Poor Mental Health Days | 5.1 | 4.4 | 4.8 |
| Adult Smoking | 12.7% | 10.8% | 15.0% |
| Adult Obesity | 25.4% | 27.5% | 34.0% |
| Air Pollution - Particulate Matter | 8.1 | 6.8 | 7.3 |
| Drinking water violation indicator | No | N/A | N/A |
| Diabetes Prevalence | 9.9% | 7.8% | 9.6% |
| Life Expectancy | 80.4 | 79.9 | 77.6 |
This report does not have PFAS sample results for the candidate water systems in Chelsea.
Check with the utility that serves your address for its testing results.
EPA drinking water records on this page list 8 violations for Chelsea Water Department (Mwra).
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 Chelsea.
The monitoring station at 25-009-2007, Saugus (Town of), Massachusetts recorded an annual average of 9.4 Micrograms/cubic meter (25 C) for particles (PM10) in 2025.
The monitoring station at 25-009-2007, Saugus (Town of), Massachusetts recorded an annual average of 5.9 Micrograms/cubic meter (LC) for fine particles (PM2.5) in 2025.
The monitoring station at 25-017-0011, Framingham, Massachusetts recorded an annual average of 6.1 Micrograms/cubic meter (LC) for fine particles (PM2.5) in 2025.
The radon data for Chelsea covers Suffolk County. EPA places this area in Zone 3, with a predicted average indoor radon screening level below 2 picocuries per liter.
No Superfund sites were returned for this city report.
This city report shows 3 brownfield sites: 203 Everett Avenue; 41 43 Orange Street; Lawrence Metal Forming.
EPA Superfund recordsView on EPA ECHOView on EPA ECHOView on EPA ECHO
The county data for Chelsea reports a life expectancy of 80.4 years in Suffolk County, Massachusetts.
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 Chelsea reports 5,918 years of life lost to deaths before age 75 per 100,000 residents in Suffolk County, Massachusetts. 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 Chelsea lists fine-particle pollution (PM2.5) at 8.1 micrograms per cubic meter in Suffolk County, Massachusetts.
The figure is from the 2024 edition of County Health Rankings, a University of Wisconsin program that publishes county health statistics.
Federal pipeline records list an incident involving Boston Gas Co near Chelsea on Feb 23, 2012. The reported release was natural gas.
Federal pipeline records list an incident involving Boston Gas Co near Chelsea on Oct 24, 2016. The reported release was natural gas.
Federal pipeline records list an incident involving Sunoco Pipeline L.P. near Chelsea on Jun 13, 2021. The reported release was a liquid petroleum product.