A Laker’s Dozen: Water Quality Improvements



This is the twelfth of 12 posts in our A Laker’s Dozen: 12 “Sweet” LHF Achievements from 2016 series – reflecting on and celebrating 2016 and the Lake Hopatcong Community.

Since 2013, the Lake Hopatcong Foundation has been partnering with Lake Hopatcong Commission and Princeton Hydro to complete many water quality improvement projects funded through a NJ DEP 319(h) Nonpoint Source Pollution Control grant. All grant projects have been completed. Without assistance provided by foundation staff to oversee the grant, some of the grant projects most likely would not have been completed and unused grant funds may have been reassigned to another area in the State.

The long-term goal of protecting the water quality and natural resources of Lake Hopatcong is to reduce the total phosphorus (TP) and total suspended solids (TSS) which are the pollutants of primary concern. Reducing the TP and TSS will improve the water quality and reduce the aquatic plant growth and algal blooms. The following grant projects and activities were implemented:

Stormwater Mgt Project Location TP Removal Rate Per Year* TSS Removal Rate Per Year* Maintenance Provided By
Rain Garden Hopatcong State Park 0.5 lbs 800 lbs Hopatcong State Park
Downstream Defender King Cove, Landing 1.5 lbs 3,704 lbs Morris County
Filterra® Biofiltration Yacht Club Drive, Jefferson (2 units); Ripplewood Drive, Jefferson (2 units) 2.0 lbs 3,283 lbs Jefferson Township
Floating Wetland Islands Ripplewood Drive, Jefferson (two 250 sq ft islands) 20 lbs N/A LHF

*Removal rates calculated by Princeton Hydro.

  • Lake Hopatcong water quality monitoring completed in 2010, 2011, 2012, 2014, 2015 and 2016. (The Lake Hopatcong Foundation covered the cost for Princeton Hydro to conduct the 2013 in-lake monitoring.) Continual water quality monitoring is a critical component for the long-term restoration of our lake. To learn why, click here.
  • Water quality monitoring program in 2015 to assess the potential presence of cyanotoxins in near-shore and beach areas throughout the lake (no microcystins, a common type of freshwater cyanotoxin, were found during the 2015 sampling events).
  • Bathymetric assessments (measuring water depth and sediment thickness) throughout 21 coves and near-shore areas throughout the lake to identify and rank those areas in highest need of sediment removal as a direct result of watershed loading.

Princeton Hydro, the environmental consultant, is completing the grant final report which, along with the bathymetric assessments, will be available on the foundation’s website upon approval by NJ DEP.

Look for our final post to wrap up our A Laker’s Dozen: 12 “Sweet” LHF Achievements from 2016 series next week!

Categories: 319(h) grant, Grants, Lake Hopatcong Commission, News, Other, Water Quality