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New Hampshire · EPA ECHO (national)
MERRIMACK SANITARY SEWER SYSTEM
Permit NH0100161
—
No waterway impact reported
Reported events
9
Total volume
12K gal
Reached waterways
0 (0%)
Reporting since
2022
What caused the overflows
Equipment Failure
6
Other / Unknown
2
Grease / FOG
1
Reported overflow events (showing 9 of 9)
| Date | Volume | Cause | Reached water | Receiving water |
|---|---|---|---|---|
| Apr 28, 2025 | 100 gal | Equipment Failure | — | — |
| Apr 30, 2024 | 4K gal | Equipment Failure | — | — |
| Apr 16, 2024 | 1K gal | Other / Unknown | — | — |
| Mar 8, 2024 | 2K gal | Other / Unknown | — | — |
| Jan 29, 2024 | 4K gal | Equipment Failure | — | — |
| Jan 22, 2024 | 1 gal | Equipment Failure | — | — |
| May 2, 2023 | 500 gal | Equipment Failure | — | — |
| Mar 16, 2023 | 2 gal | Grease / FOG | — | — |
| Aug 16, 2022 | 75 gal | Equipment Failure | — | — |
Source: EPA ECHO (national). Volumes are utility-reported estimates. Some events lack precise coordinates or volumes.