These are possible serving systems. A record for one system does not apply to every home in this ZIP. Confirm your provider before interpreting a measurement or notice. Federal records can lag current utility notices.
EPA snapshot: 2026Q2. Historical window begins Jan 1, 2021.
Hyannis Water System, Town Of Barnstable
MA4020004 · Groundwater · 35,000 people served system-wide
EPA SDWIS explicitly lists this ZIP in the system's served geography.
No active health-based record in this imported snapshot
Find this utility’s official report →Measurements (1)
An action level is a regulatory trigger, not a pass/fail health boundary. A reported zero is the value in the source record and does not establish that lead is absent at your tap.
Lead (90th percentile)
EPA SDWIS Lead and Copper Rule samples
- Reported level
- Action level
0% of the listed benchmark
Monitoring period: Jan 1, 2025 to Dec 31, 2025
Violation history (0)
No record returned in this imported window. This is not a guarantee of tap-water safety.
Barnstable Fire District
MA4020000 · Groundwater · 5,400 people served system-wide
EPA SDWIS explicitly lists this ZIP in the system's served geography.
No active health-based record in this imported snapshot
Find this utility’s official report →Measurements (2)
An action level is a regulatory trigger, not a pass/fail health boundary. A reported zero is the value in the source record and does not establish that lead is absent at your tap.
Lead (90th percentile)
EPA SDWIS Lead and Copper Rule samples
- Reported level
- Action level
9% of the listed benchmark
Monitoring period: Jan 1, 2026 to Jun 30, 2026
Copper (90th percentile)
EPA SDWIS Lead and Copper Rule samples
- Reported level
- Action level
108% of the listed benchmark
Monitoring period: Jan 1, 2011 to Dec 31, 2013
Violation history (0)
No record returned in this imported window. This is not a guarantee of tap-water safety.
Cotuit Fire District Water Department
MA4020003 · Groundwater · 4,938 people served system-wide
EPA SDWIS explicitly lists this ZIP in the system's served geography.
No active health-based record in this imported snapshot
Find this utility’s official report →Measurements (1)
An action level is a regulatory trigger, not a pass/fail health boundary. A reported zero is the value in the source record and does not establish that lead is absent at your tap.
Lead (90th percentile)
EPA SDWIS Lead and Copper Rule samples
- Reported level
- Action level
21% of the listed benchmark
Monitoring period: Jan 1, 2023 to Dec 31, 2025
Violation history (0)
No record returned in this imported window. This is not a guarantee of tap-water safety.
Centerville Osterville Marstons Mills Wd
MA4020002 · Groundwater · 50,000 people served system-wide
EPA SDWIS explicitly lists this ZIP in the system's served geography.
No active health-based record in this imported snapshot
Find this utility’s official report →Measurements (1)
An action level is a regulatory trigger, not a pass/fail health boundary. A reported zero is the value in the source record and does not establish that lead is absent at your tap.
Lead (90th percentile)
EPA SDWIS Lead and Copper Rule samples
- Reported level
- Action level
16% of the listed benchmark
Monitoring period: Jul 1, 2025 to Dec 31, 2025
Violation history (1)
Imported violation history for Centerville Osterville Marstons Mills Wd| Rule | Status | Period |
|---|
| Nitrate | Archived | Apr 1, 2024 to Jun 30, 2024 |