LIST OF IMPAIRED WATERS
Nashua, New Hampshire
33
Impairment(s) and Associated
Water Body Name Segment ID Category Approved TMDL
Nashua River — Mine Falls |» NHIMP700040402-02 Dissolved oxygen saturation | Northeast
Dam Pond
(5-P), pH (5-M), Non-native
aquatic plants (4C-M),
Mercury (4A-M),
Cyanobacteria hepatotoxic
microcystins (5-M)
Regional Mercury
TMDL
Nashua River — Nashua
Canal Dike
NHIMP700040402-03
Chloride’ (5-M), pH (5-M),
Non-native aquatic plants
(4C-M), Mercury (4A-M)},
Chlorophyll-a (5-P)
Northeast
Regional Mercury
TMDL
Nashua River
NHIMP700040402-04
Non-native aquatic plants
(4C-P), Mercury (4A-M)
Northeast
Regional Mercury
TMDL
Nashua River - Jackson
Plant Dam Pond
NHIMP700040402-05
E. Coli (4A-M), Non-native
aquatic plans (4C-P),
Mercury (4A-M)
New Hampshire
Statewide
Bacteria TMDL,
Northeast
Regional Mercury
TMDL
Pennichuck Brook - Harris
Pond Dam
NHIMP700061001-05
Mercury (4A-M)
Northeast
Regional Mercury
TMDL
Holt Pond
NHLAK70006 1001-06
Dissolved oxygen saturation
(S-M), Oxygen, Dissolved (5-
P), pH (5-M), Mercury (4A-
M)
Northeast
Regional Mercury
TMDL
Old Maids Brook -
McLaughlin Dam
NHIMP700061201-02
Mercury (4A-M)
Northeast
Regional Mercury
TMDL
Salmon Brook
NHIMP700061201-03
Mercury (4A-M)
Northeast
Regional Mercury
TMDL
Salmon Brook
NHIMP700061201-04
Mercury (4A-M)
Northeast
Regional Mercury
TMDL
Spit Brook NHIMP700061206-08 | Mercury (4A-M) Northeast
Regional Mercury
TMDL
Harris Pond NHLAK700061001-04- | Iron (5-M), Mercury (4A-M), | Northeast
01
Cyanobacteria hepatotoxic
microcystins (5-M)
Regional Mercury
TMDL
Bowers Pond
NHLAK700061001-04-
Mercury (4A-M)
Northeast
* Note: Comments have been submitted on the 2020 draft 303(d) list detailing that the data does not support assessment
of a chloride impairment for this receiving waterbody, as a result, the City of Nashua will implement the requirements as
applicable based on the final decision by NHDES on use support.
Hic it Discharge Detection and Himination Plan 33
