Results from Salt Testing, Little Falls Branch

Salt Testing Little Falls Branch*

Learn about our salt testing 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

 Sept. 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

>800 ppm ***

 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

 Feb 1, 2019**

159 ppm

no sampling

no sampling

 Feb. 3, 2019**

173 ppm

no sampling

no sampling

 Feb. 21, 2019**

173 ppm

no sampling

646 ppm

  * Results are in Parts Per Million (ppm)

** These dates were after a snow event

*** Quantab strip reading was 9.2, which is off the ppm chart which only goes up to 7.8 for Quantab units.

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