Site Description

Site ID: LB01
Roxbury Township, Morris County
Stream Category: FW2-TP (Category 2, Trout production waters)
Site monitors Drakes Brook (above Eyland Ave) subwatershed (HUC: 02030105010010)
The site is located about 270 feet upstream of Ledgewood Pond, off of Emmans Road.  Park at Ledgewood Park and proceed upstream from the pond until you find the riffle.

What is being monitored at this site?

  • Biological and Visual Assessments (?)
  • Chemical Testing (?)

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Water Quality Data

Each June, Raritan Headwaters scientists and volunteers visit 72 stream sites in the North and South Branch Raritan Watershed Region (WMA8) of New Jersey to collect data on the health of our streams.  Data collected includes a sample of benthic macroinvertebrates (used to calculate the High Gradient Macroinvertebrate Index;HGMI score), an assessment of the habitat in and around the stream, and chemical conditions in the water.  Chemical parameters include dissolved oxygen, phosphate, chloride, specific conductance, nitrate, turbidity, pH, and temperature. The HGMI is used by the NJ Department of Environmental Protection (NJDEP) and the US Environmental Protection Agency (USEPA) to determine if the site is meeting state and national water quality standards under the Clean Water Act. Click here to learn more about our stream monitoring program and water quality reports.


Site Data for LB01

Select a parameter below to view annual data. Hover over the chart to get more information.

Threats and Recommendations

The HGMI at LB01 was found to be good  in 2019, which means it was not biologically impaired. LB01 has consistently scored good, in recent years, with respect to HGMI, meaning that this stream has very high water quality. Though the HGMI scored high, the habitat scored sub-optimal. This site suffers from high embeddedness, which means that there are not spaces between the stream gravel for the stream macroinvertebrates to take refuge from predators. This site also has high sedimentation rates and low bank stability.  In systems like this, we must make an effort to preserve high water quality, while also mitigating the habitat issues. Increasing stream bank vegetation can help to increase bank stability.



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