Environmental hazards, flood and water records in Chelsea, MA
Public environmental, infrastructure and surveillance records inside Chelsea's municipal boundary, plus the regional air, drinking-water, flood, radon and Superfund context that does not stop at the town line. Each item links to its original record. Nothing here is a risk score.
Explore Chelsea on the map ↗ Check a specific address in Chelsea See a sample brief
Read terminal releases chemical by chemical
For the Chelsea Eastern Avenue terminal record, compare the reported chemicals, reporting year and EPA compliance details. A release total alone cannot tell you the concentration at a nearby home; ask the permitting agency about available monitoring or modeling.
GLOBAL COS LLC - CHELSEA EASTERN AVE TERMINAL · Source status: Reported for 2024
Source-backed investigation note · explanation updated September 14, 2026. Record dates remain those of the linked source.
Who to ask in Chelsea
Start with Chelsea's health department for local environmental questions, the conservation office for wetlands and local flood records, and the building department for parcel-related permits. Find Chelsea's official department directory ↗.
For drinking water, confirm the household connection and ask the listed supplier for its latest water-quality report: CHELSEA WATER DEPT. (MWRA). See the dated results and boundary limitations below.
Counts are records inside the municipal boundary, not unique facilities and not a ranking. Sources carry different dates (June 2024 for MassDEP waste layers, TRI 2024, OpenStreetMap Sept 2026). Community-mapped items are unverified. No record does not prove absence.
Records inside Chelsea
The most consequential categories first. Open a record for its EPA compliance history, reported chemicals, what the record can and cannot tell you, and who to ask next.
Landfills Agency record
Hazardous-waste facilities Agency compliance record
- CATALENT Significant non-complier
Industrial reporting Facility self-report + EPA compliance
- GLOBAL COS LLC - CHELSEA EASTERN AVE TERMINAL Violation-UnresolvedCarcinogen-flagged air release
- CHELSEA SANDWICH LLC Carcinogen-flagged air release
Cleanup sites Agency record
- 41-43 ORANGE STREET
- AMOCO PETROLEUM TERMINAL
- CITY OF CHELSEA MAP PARCEL 75-13
- EDEN ST
- FMR CABOT PAINT
- GULF OIL TERMINAL
- INTERSECTION OF HIGHLAND AND SUFFOLK STS
- INTERSECTION WITH BEECH ST
+ 11 more on the map.
Transmission lines Archived geometry
- 115 kV transmission line
- 115 kV transmission line
Communications Community mapped
- Communications tower / antenna
Mapped cameras Community mapped
- Mapped camera
- Mapped camera
- Mapped camera
- Mapped camera
- Mapped camera
- Mapped camera
- Mapped camera
- Mapped camera
+ 73 more on the map.
Beyond the town line
Air pollution follows wind and stack height, water comes from wherever the supplier draws it, and a Superfund plume ignores municipal boundaries. These items are searched from the town's center across state lines.
Incinerators within 30 miles
- WHEELABRATOR SAUGUS INC
- WHEELABRATOR NORTH ANDOVER INCORPORATED
- REWORLD HAVERHILL LLC F.K.A. COVANTA HAVERHILL INCORPORATED
- PELHAM TRANSFER & RECYCLING FACILITY
- PET MEMORIAL PARK
- WINDHAM, TOWN OF
A 30-mile extent is EPA's air-modeling distance for toxic releases, used here as a search limit, not a danger radius.
Superfund sites within 10 miles
Largest reported air releases within 30 miles
- IDEAL TAPE CO
- CALPINE FORE RIVER ENERGY CENTER LLC
- ENTEGRIS INC
- DUNCAN GALVANIZING CORP.
- DAMPNEY CO INC
- BOSTIK MANUFACTURING PLANT
Pounds are facility self-reports, not concentrations in Chelsea, and chemicals differ widely in toxicity. How to read TRI and ECHO records ↗
Drinking water, radon, air quality, flood
Community water systems serving Chelsea
- CHELSEA WATER DEPT. (MWRA) No health-based violations since 2021-01-01
Boundaries are estimates and do not verify a household connection. Sample results are at treatment or entry points, not at a tap. Drinking-water questions to ask ↗ · PFAS explained ↗
Radon, particle pollution, flood
Radon: Suffolk County is EPA Zone 3, the lowest predicted potential (below 2 pCi/L). EPA says the zone map must not be used to decide whether to test; homes in every zone have measured high levels. Testing guidance ↗
Fine particles (PM2.5): nearest regulatory monitor Chelsea (Chelsea, MA, 0.9 mi) measured a 2025 annual mean of 6.2 µg/m³; the annual standard adopted in 2024 is 9.0 µg/m³ on a three-year design value. A monitor reports its own location, not Chelsea.
Flood: FEMA flood zones are point-specific. Use the map to query the National Flood Hazard Layer live at an address. Flood questions to ask ↗
Major roads: 108 mapped motorway, trunk or primary segments cross Chelsea. Road proximity is a cue for traffic noise and emissions, not a measurement. More ↗
Documented surveillance technology in Chelsea
Agency-level records from the EFF Atlas of Surveillance. These describe documented technology use, not device locations or current operation.
- Chelsea Police Department · Body-worn Cameras
- Chelsea Police Department · Gunshot Detection · ShotSpotter
- Chelsea Police Department · Automated License Plate Readers · ELSAG
- Chelsea Police Department · Third-party Investigative Platforms · SoundThinking
Do not use registry information to commit a crime, harass anyone or engage in illegal discrimination. Massachusetts law prohibits these uses. These town totals are not individual background checks or eligibility decisions.
Sex offender registry information in Chelsea, Massachusetts
Count not published for Chelsea in this source. The selected report supplies totals for ten cities only. This means unknown here, not zero.
For current public records, open the official Massachusetts registry search and select Chelsea.
Published municipal totals are not a crime rate or safety rating. The city table does not separate registry classifications and is not equivalent to public online search counts. Read the registry coverage guide.
Table labeled 2024 · source date as printed: August 5, 2024 · Official report, Table 7, page 24.
Questions worth asking before you commit
Compiled from the guides for the record types actually present in or near Chelsea.
Environmental regulator
Request groundwater and gas monitoring, closure plans and any off-site migration findings. (Landfills & land-disposal sites)
Request the inspection reports behind the current violation and the corrective-action status. (Hazardous-waste facilities (RCRA))
Request the latest site investigation, plume maps, cleanup status and any activity/use limitations. (Cleanup sites & historic contamination)
Review chemical-specific emissions, inspections and the underlying documents for any violation. (Industrial releases & air-program facilities)
Request the current air permit, recent stack tests and any published dispersion study. (Incinerators & waste-to-energy)
Ask whether nearby private wells or indoor air have been sampled and what the results were. (Superfund (National Priorities List) sites)
Water supplier / well professional
Confirm the drinking-water source and whether site-related contaminants have been tested. (Landfills & land-disposal sites)
Seller / inspector
Ask about recorded land-use restrictions and any environmental reports for the parcel. (Landfills & land-disposal sites)
Request environmental disclosures and maintenance records for any mitigation system. (Cleanup sites & historic contamination)
Check any tower lease/easement, lighting and generator-noise concerns. (Communications towers & antennas)
Confirm municipal water versus private well and request available water-quality and plumbing records. (Drinking water & groundwater)
For a private well, request PFAS test results or arrange a test with a certified laboratory. (PFAS in drinking water)
Request dated radon test results and any mitigation-system records. (Radon inside the home)
Request flood and water-intrusion history, drainage repairs and elevation documents. (Flood context)
Visit during rush hour and at night; assess window and ventilation conditions. (Major roads & traffic)
Facility operator
Ask which wastes are handled, what monitoring is done and whether results are public. (Hazardous-waste facilities (RCRA))
Ask which emissions controls and monitoring apply to the relevant process. (Industrial releases & air-program facilities)
Which pollutants are monitored, how often, and are results public? (Incinerators & waste-to-energy)
Qualified environmental professional
Determine whether site-specific vapor, soil or well testing is appropriate. (Cleanup sites & historic contamination)
Environmental professional
Look for a published dispersion or exposure assessment before interpreting personal risk. (Industrial releases & air-program facilities)
Title professional / utility
Confirm the recorded easement, access rights and restrictions on structures or vegetation. (Transmission lines)
Qualified field-measurement professional
If this is a concern, discuss appropriate measurements and their limitations. (Transmission lines)
Planning department / operator
Request the equipment description, siting permit and applicable RF compliance assessment. (Communications towers & antennas)
Agency / device operator
Request the current collection, retention, access and sharing policy. (Cameras, plate readers & privacy)
Agency records office
Ask for the deployment approval, contract, audit policy and oversight reports. (Cameras, plate readers & privacy)
Local health department
Are there monitoring studies or investigated odor/air complaints for this area? (Incinerators & waste-to-energy)
EPA site manager / community involvement coordinator
Request the current site status, the operable-unit boundaries, plume maps and any five-year review findings. (Superfund (National Priorities List) sites)
Title professional
Check for recorded activity and use limitations or easements tied to the cleanup. (Superfund (National Priorities List) sites)
Water supplier
Confirm service to the address and request the latest Consumer Confidence Report and relevant sampling results. (Drinking water & groundwater)
Ask for the most recent PFAS results, the treatment in place and the compliance schedule if a limit was exceeded. (PFAS in drinking water)
Certified laboratory / local health department
For a private well, discuss a testing panel appropriate to local conditions. (Drinking water & groundwater)
State drinking-water program
Ask whether the system is under a PFAS order and where the public notices are. (PFAS in drinking water)
Qualified radon professional
Arrange appropriate testing and discuss mitigation if results warrant it. (Radon inside the home)
Local floodplain administrator
Confirm the effective map, any map revisions and building-specific requirements. (Flood context)
Insurer
Obtain a property-specific flood insurance quote and coverage explanation. (Flood context)
Transportation department
Request recent traffic counts, truck routes and planned road changes. (Major roads & traffic)
Neighboring towns
Sources: MassDEP solid waste (June 2024) and tier-classified sites, EPA TRI 2023–2024, EPA ECHO (retrieved 2026-10-03), EPA NPL, EPA AQS, EPA UCMR 5, EPA SDWIS, MassDEP water service areas, EPA radon zones, HIFLD, OpenStreetMap (ODbL), EFF Atlas of Surveillance (CC BY). Guidance reviewed 2026-09-13. Methodology and limits · Report a problem with a record.