Naturally, chlorine is only found in combination with other elements, chiefly potassium. It also has a variety of anthropogenic uses, from wastewater treatment to road deicing, and runoff from industrial sources and roads can be contaminated with chlorine compounds. When chlorine compounds, especially from deicing, reach local waterways, there is a long-term storage effect of the chemicals, which leads to serious issues in the ecosystem.
There are many animals and plants in ecosystems that formed symbiotic relationships with bacteria long ago, which have now become essential to their survival. As a known antiseptic, chlorine can harm the microbiota of organisms that live in streams and lakes. These salts also increase the salinity of aquatic ecosystems, which throws the delicate balance of osmosis and diffusion in cells out of balance. Many organisms simply cannot function in these conditions.
Once chlorine is present in an ecosystem, it can take many years of clean conditions to flush the contamination out of the environment completely. Below are some ways to ensure chlorine will not enter your local waterways:
How You Can Help
Are you a member of a group or organization in your community that would be interested in adopting this waterway? Contact the Cumberland River Compact if you’re interested in learning more about stream adoption.
Turn off the chlorination system of your pool several days before draining, as this contaminated water has the potential to end up in waterways. NEVER drain a pool or spa into a street drain or a drainage ditch – these will send chlorinated water directly into waterways, killing aquatic life. Assure your pool cannot overflow during stormy weather.
1) Guidelines for Draining Your Pool or Spa - Metro Nashville
2) Drain Your Pool the Right Way - City of London, Ontario
3) 10 Ways to Maintain An Eco-Friendly Pool - Swim University
3) Green Pool Products - Pool Center
Deicing can be extremely detrimental to aquatic ecosystems. Make use of non-toxic options where possible. Encourage those responsible for significant deicing activity in your community to consider non-toxic or less toxic options.
1) How to Reduce the Environmental Impact of Deicing Roads - Pacific Northwest Pollution Prevention Resource Center
2) Explore a variety of eco-friendly deicing options in EPA’s Safer Choice list . - EPA
3) Managing Highway Deicing to Prevent Contamination of Drinking Water. - EPA
If you live or work next to a waterway, leave a 35′ to 100′ no mow zone on its banks. Allow natural and native plant growth in this buffer area or plant native trees, bushes, and groundcover. This vegetation can filter pollutants before they reach your waterway and provide other water quality benefits that far exceed those of a mowed lawn. Native plants and grasses require less watering and fertilizer and also provide important habitat for native species of wildlife.
1) Free trees for Tennesseans during TEC's annual statewide 100K Tree Day - TN Environmental Council
2) Purchase Native Wildflower/Grass Alternatives to Mowed Grass - Roundstone Native Seed and/or Seedland
3) Tennessee Aquatic Stream Clean Up and Riparian Tree Grant (Scroll to bottom of linked page for more info) - TN Wildlife Resources Agency
4) General Guidelines for Volunteer Based Riparian Buffer Plantings - TN Environmental Council
5) Improving Stream Channels With Live Staking - UT Extension
6) Tennessee Urban Riparian Buffer Handbook - TN Dept. of Agriculture
7) Landscaping with Native Plants in West, Middle, and East TN - TN Wildlife Resources Agency
8) Native Plants for TN - UT Extension
9) Forest Stewardship Program and Landowner Services - KY Division of Forestry
10) Plant Availability Guide - KY Department of Agriculture
11) State Nurseries and Tree Seedlings - KY Division of Forestry
Rain gardens can filter and infiltrate stormwater that flows across your yard.
1) Rain Gardens - A Resource Guide - Cumberland River Compact and Metro Nashville
2) TN Native Rain Garden Plants - UT Extension
3) Rain Gardens for Tennessee - UT Extension
4) Rain Gardens Educator's Toolkit, Rain Gardens for Tennessee Site Summary, and Rain Garden Facts and Tips - UT Extension
5) Rain Garden How-to Brochure - Harpeth River Watershed Association
6) Rain Garden Guide for Middle Tennesseans by Patty Ghertner
7) Start-to-Finish Rain Garden Workbook - Harpeth River Watershed Association
8) Rain Garden Workshop Guide - TN Environmental Council
9) Landscaping with Native Plants in West, Middle, and East TN - TN Wildlife Resources Agency
10) Native Plants for TN - UT Extension
11) Plant Availability Guide - KY Department of Agriculture
Impervious or impermeable surfaces, like pavement, contribute significantly to polluted stormwater runoff and alter stream flow habitat. If you've got excess pavement you'd like removed, consider a de-paving project with the Compact. Elsewhere, ensure that your downspouts drain to vegetation, gravel, or rainbarrels, rather than impervious surfaces. If you constructing or repairing your driveway, pervious pavement allows stormwater to infiltrate and filter through the ground. If you can’t do the whole drive, consider making only the portion closest to the street pervious.
1) De-paving Work - Cumberland River Compact (Call 615-837-1151)
2) Rain Barrel Sales - Cumberland River Compact
3) Rain Barrels Make Good Sense - UT Extension
Participate in community planning efforts and advocate for relevant measures that improve or protect water quality. Write to your elected official and let them know this is concern or invite them to speak about the impairment with your home-owners association. When elections come up, vote for candidates who will address the problem and hold them accountable to their promises. Support local watershed / environmental associations.
1) Advocacy Toolkit - TN Environmental Council
2) Find Your Legislators - Federal Legislators; State Legislators (KY/TN); Local Legislators (KY/TN)
Do your neighbors, family, or roommates know about the problem? Now that you know how to be an effective steward, enlist the help of others in your neighborhood. Share iCreek or resources within it with your neighbors and encourage them to join the effort to protect your creek.