Results from Salt Testing, Little Falls Branch

Salt Testing Little Falls Branch*

Learn about our salt testing team HERE.

Sampling Date

Somerset

Green Acres

Mass. Ave.

June 2018

75 ppm

122 ppm

146 ppm

July 2018

< 29 ppm (below detection)

no sampling

no sampling

August 2018

no sampling

no sampling

140 ppm

September 2018

<29 ppm

no sampling

no sampling

October 2018

no sampling

no sampling

122 ppm

November 2018

<29 ppm

29 ppm

134 ppm

December 2018

<29 ppm

35 ppm

122 ppm

Jan. 14 2019**

no sampling

no sampling

>639 ppm (off the chart)

Jan. 15, 2019**

299 ppm

no sampling

no sampling

Jan. 18, 2019**

548 ppm

no sampling

no sampling

Jan. 20, 2019**

no sampling

29 ppm

no sampling

Jan. 29, 2019**

134 ppm

no sampling

no sampling

 

  * Results are in Parts Per Million (ppm)
** These dates were after a snow event

The EPA states that a salt reading of 250 ppm is harmful to the macro invertebrates living in the creek; a reading of 860 ppm is maximum they can stand.  A "normal" reading for a stream should be 20 ppm. 

Testing Site Locations:

  • Somerset - Little Falls Branch in Somerset below the bridge at the end of Falstone Avenue, Chevy Chase MD
  • Green Acres - Little Falls Branch in Green Acres neighborhood, upstream from where the creek runs under Mass Avenue.  The stream is fully chanalized in this area.
  • Massachusetts Ave - Little Falls Branch in the Little Falls Stream Valley Park.  Testing Site is 50 feet below the intersection of Mass Ave. and Little Falls Parkway.

Protocol:

Little Falls Watershed Alliance's salt testing team participates in the Izaak Walton WinterSalt Watch and shares their results on the Water Reporter.  Learn about the program at HERE