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Table 1-2. Water Quality Summary Chart for

the Gulf and Scituate Harbor Watersheds

Waterbodies At Risk

Impairment Level


Proposed Solutions

Bound Brook

Aaron River

Herring Brook

Level 5: TMDL required

Dysfunctional fish

*Conduct water quality testing at areas

Dense aquatic vegetation near flow control structure and Hunters Pond Dam; turbidity


impacted by run-offs and improve storm

water drainage systems. *Evaluate sources of nutrients * Remove dam at Hunters Pond * Upgrade fish passage

Level 5: TMDL Required- dense aquatic vegetation, exotic species, flow alteration, turbidity, excess algal growth,

Flow alterations contribute to deteriorating water quality conditions

*Maintain natural flow regime

Level 4: TMDL not required-impaired exotic species

Dysfunctional fish ladder, flow alterations

*Maintain natural flow regime

Little Harbor Estuary

Level 5: TMDL Done 2002 for fecal coliform

Failing or inadequate on-site septic systems

Musquashcut Pond Estuary

Level 5: TMDL Required- fecal coliform, algal growth, elevated phosphorus, impaired flow

Tidal gate, inadequate/failing septic

Cohasset Cove/Harbor

Level 5: fecal coliform

Municipal point source discharge, boat discharges

The Gulf Estuary

Level 5:TMDL required due to fecal coliform

Suspected Sources: septic systems, discharges from municipal separate storm sewer systems

Aaron River Reservoir/Lily Pond

Level 4: No TMDL

Mercury; flow alteration, Impaired fish passage

Lily Pond

Level 5: TMDL Required

Turbidity, flow alteration, exotic species

Source: DEP Water Quality Assessment Report (2006)

*Upgrade septic systems *Restore riparian buffers

  • *

    Monitor water quality around outfalls,

implement best management practices.

  • *

    Continue to implement sewer expansion.

    • *

      Restore tidal flow

*Investigate and address stormwater pollutants in James Brook; restore tidal flow to James Brook *Monitor water quality at hot spots around Bassings Beach. Sandy Cove, Assess impacts of WWTP effluent on marine ecosystem Maintain natural flow regime

*Reduce Source reduction from untreated stormwater

  • *

    Harvest exotic species around intake pipe

*Conduct Hydraulic dredging project *Develop lawn fertilizer package (ENSR, 2003)

South Coastal Watershed Action Plan 9/12/2006 Watershed Action Alliance


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