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New Hampshire · EPA ECHO (national)

MANCHESTER SANITARY SEWER SYSTEM

Permit NH0100447

—
No waterway impact reported
Reported events
71
Total volume
17.3M gal
Reached waterways
0 (0%)
Reporting since
2022

What caused the overflows

Rainfall / Flooding
62
Grease / FOG
5
Other / Unknown
3
Root Intrusion
1

Reported overflow events (showing 71 of 71)

DateVolumeCauseReached waterReceiving water
May 30, 20263K galRainfall / Flooding——
Apr 10, 20261K galGrease / FOG—Piscataquog River
Apr 1, 202612K galRainfall / Flooding——
Oct 20, 20258K galRainfall / Flooding——
Sep 3, 2025250 galOther / Unknown——
Jul 3, 202514K galRainfall / Flooding——
Jun 7, 202510K galRainfall / Flooding——
Jun 6, 20253K galRainfall / Flooding——
Jun 6, 20256K galRainfall / Flooding——
May 31, 2025833 galRainfall / Flooding——
May 18, 20254K galRainfall / Flooding——
May 10, 20253K galRainfall / Flooding——
May 9, 20253K galRainfall / Flooding——
May 5, 20253K galRainfall / Flooding——
Mar 17, 20259K galRainfall / Flooding——
Jan 3, 20254K galGrease / FOG——
Aug 19, 20245K galRainfall / Flooding——
Aug 19, 20243K galRainfall / Flooding——
Aug 4, 202420K galRainfall / Flooding——
Aug 4, 202412K galRainfall / Flooding——
Aug 4, 20245K galRainfall / Flooding——
Aug 3, 20248K galRainfall / Flooding——
Jul 16, 20248K galRainfall / Flooding——
May 26, 20244K galRainfall / Flooding——
Apr 12, 20248K galRainfall / Flooding——
Apr 4, 202450 galOther / Unknown——
Mar 10, 20243K galRainfall / Flooding——
Mar 7, 202411K galRainfall / Flooding——
Jan 10, 202428K galRainfall / Flooding——
Dec 18, 20233K galRainfall / Flooding——
Dec 18, 202314K galRainfall / Flooding——
Dec 18, 20239K galRainfall / Flooding——
Dec 10, 202311K galRainfall / Flooding——
Nov 14, 202360 galRoot Intrusion——
Sep 18, 202314K galRainfall / Flooding——
Sep 11, 202314K galRainfall / Flooding——
Sep 11, 202318K galRainfall / Flooding——
Sep 10, 202315K galRainfall / Flooding——
Sep 8, 202337K galRainfall / Flooding——
Aug 8, 202310K galRainfall / Flooding——
Jul 29, 202310K galRainfall / Flooding——
Jul 21, 2023120 galGrease / FOG——
Jul 16, 2023—Rainfall / Flooding—Merrimack River
Jul 15, 20237K galRainfall / Flooding——
Jul 2, 202323K galRainfall / Flooding——
Jun 28, 202333K galRainfall / Flooding——
Jun 26, 202343K galRainfall / Flooding——
May 1, 202310K galRainfall / Flooding——
Feb 8, 202316.4M galOther / Unknown——
Feb 6, 2023300 galGrease / FOG——
Feb 6, 2023300 galGrease / FOG——
Jan 26, 20235K galRainfall / Flooding——
Dec 23, 20225K galRainfall / Flooding——
Dec 23, 202213K galRainfall / Flooding——
Dec 23, 202215K galRainfall / Flooding——
Dec 7, 202212K galRainfall / Flooding——
Nov 11, 202211K galRainfall / Flooding——
Sep 22, 202244K galRainfall / Flooding——
Sep 19, 202212K galRainfall / Flooding——
Sep 5, 202213K galRainfall / Flooding——
Aug 31, 202214K galRainfall / Flooding——
Jul 28, 20226K galRainfall / Flooding——
Jul 25, 202235K galRainfall / Flooding——
Jul 21, 20228K galRainfall / Flooding——
Jul 12, 20228K galRainfall / Flooding——
Jun 9, 20228K galRainfall / Flooding——
Jun 1, 20223K galRainfall / Flooding——
May 28, 202217K galRainfall / Flooding——
Apr 8, 202256K galRainfall / Flooding——
Apr 8, 202256K galRainfall / Flooding——
Feb 22, 202240K galRainfall / Flooding——

Source: EPA ECHO (national). Volumes are utility-reported estimates. Some events lack precise coordinates or volumes.