Site Description

Site ID: BE01
Clinton Town, Hunterdon County
Stream Category: FW2-TM (Category 2, Trout Maintenance)
Site monitors Beaver Brook subwatershed. (HUC: 02030105020050)
The site is located upstream from the Leigh Street bridge, adjacent to the Clinton municipal building parking lot.

What is being monitored at this site?

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 BE01

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

Threats and Recommendations

The HGMI at BE01 was found to be fair in 2019, which means it was biologically impaired. Because BE01 has been consistently impaired based on the HGMI for more than 2 years, it is part of our quarterly chemical monitoring program so that we can begin to identify and address the causes of impairment. This site is located within an agriculturally rich section of our watershed, which means that run off from farm fields as well as lack of riparian buffers are likely negatively impacting the water quality of this stream. The biggest water quality issue that we found at this site was high levels of phosphates in the water. Most of the anthropogenic phosphates in streams comes from stormwater run-off, wastewater treatment plants, and septic systems. High levels of nutrients such as phosphates and nitrates cause an overgrowth of bacteria and algae and eventually result in oxygen depletion. Most of the chloride in freshwater streams comes from run-off of road salts into waterways during the winter months. Chloride can also leach into the groundwater and find its way back to the surface water later in the year, meaning that chloride can remain high even when road salting isn’t active.



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