Cohasset, MA
Contamination score
Higher = more contaminated vs. other cities.
Reported illness & cancer claims
No claims reported yet. Be the first to add one.
Claims are aggregated from public records and community reports and may be unverified. If you believe your illness is linked to local water, request a consultation.
Self-reported issues
No issues reported yet. Be the first to report one.

Public water systems
Cohasset Water Dept
- PWSID:
- MA4065000
- Source:
- Surface water
- Serves:
- 7,555 people
EPA & DEP violations
Consumer Confidence Rule — Other violation
medium severityResolvedConsumer Confidence Rule Other violation (Resolved).
EPA SDWIS · Other · Began Jul 1, 2022 · 3 years ago · Source ↗
Interim Enhanced Surface Water Treatment Rule — MR violation
medium severityArchivedInterim Enhanced Surface Water Treatment Rule MR violation (Archived).
EPA SDWIS · MR · Began Jun 1, 2021 · 5 years ago · Source ↗
Carbofuran — MR violation
medium severityArchivedCarbofuran MR violation (Archived).
EPA SDWIS · MR · Began Apr 1, 2021 · 5 years ago · Source ↗
Chlordane — MR violation
medium severityArchivedChlordane MR violation (Archived).
EPA SDWIS · MR · Began Apr 1, 2021 · 5 years ago · Source ↗
Endrin — MR violation
medium severityArchivedEndrin MR violation (Archived).
EPA SDWIS · MR · Began Apr 1, 2021 · 5 years ago · Source ↗
ETHYLENE DIBROMIDE — MR violation
medium severityArchivedETHYLENE DIBROMIDE MR violation (Archived).
EPA SDWIS · MR · Began Apr 1, 2021 · 5 years ago · Source ↗
Heptachlor — MR violation
medium severityArchivedHeptachlor MR violation (Archived).
EPA SDWIS · MR · Began Apr 1, 2021 · 5 years ago · Source ↗
Pentachlorophenol — MR violation
medium severityArchivedPentachlorophenol MR violation (Archived).
EPA SDWIS · MR · Began Apr 1, 2021 · 5 years ago · Source ↗
Toxaphene — MR violation
medium severityArchivedToxaphene MR violation (Archived).
EPA SDWIS · MR · Began Apr 1, 2021 · 5 years ago · Source ↗
2,4,5-TP — MR violation
medium severityArchived2,4,5-TP MR violation (Archived).
EPA SDWIS · MR · Began Apr 1, 2021 · 5 years ago · Source ↗
BHC-GAMMA — MR violation
medium severityArchivedBHC-GAMMA MR violation (Archived).
EPA SDWIS · MR · Began Apr 1, 2021 · 5 years ago · Source ↗
Total Polychlorinated Biphenyls (PCB) — MR violation
medium severityArchivedTotal Polychlorinated Biphenyls (PCB) MR violation (Archived).
EPA SDWIS · MR · Began Apr 1, 2021 · 5 years ago · Source ↗
1,2-DIBROMO-3-CHLOROPROPANE — MR violation
medium severityArchived1,2-DIBROMO-3-CHLOROPROPANE MR violation (Archived).
EPA SDWIS · MR · Began Apr 1, 2021 · 5 years ago · Source ↗
Dalapon — MR violation
medium severityArchivedDalapon MR violation (Archived).
EPA SDWIS · MR · Began Apr 1, 2021 · 5 years ago · Source ↗
Di(2-ethylhexyl) phthalate — MR violation
medium severityArchivedDi(2-ethylhexyl) phthalate MR violation (Archived).
EPA SDWIS · MR · Began Apr 1, 2021 · 5 years ago · Source ↗
Dinoseb — MR violation
medium severityArchivedDinoseb MR violation (Archived).
EPA SDWIS · MR · Began Apr 1, 2021 · 5 years ago · Source ↗
Diquat — MR violation
medium severityArchivedDiquat MR violation (Archived).
EPA SDWIS · MR · Began Apr 1, 2021 · 5 years ago · Source ↗
HEXACHLOROBENZENE — MR violation
medium severityArchivedHEXACHLOROBENZENE MR violation (Archived).
EPA SDWIS · MR · Began Apr 1, 2021 · 5 years ago · Source ↗
Hexachlorocyclopentadiene — MR violation
medium severityArchivedHexachlorocyclopentadiene MR violation (Archived).
EPA SDWIS · MR · Began Apr 1, 2021 · 5 years ago · Source ↗
Simazine — MR violation
medium severityArchivedSimazine MR violation (Archived).
EPA SDWIS · MR · Began Apr 1, 2021 · 5 years ago · Source ↗
Water-related lawsuits
No lawsuits on record.
In the news & sources
No coverage linked yet.