Rapid City, South Dakota

Rapid City, South Dakota Rapid City, South Dakota

Water Quality in Rapid City, South Dakota

Watershed: Cyclone Ditch – Rapid Creek

What is the water quality like in Rapid City, SD?

Let’s dive deeper into what’s in Rapid City water.

What’s in your water?

Here are the top 3 chemical compounds in your water and what health issues they can potentially cause:

  1. Hexavalent Chromium – Potential effect: Cancer
  2. Radium – Potential effect: Cancer
  3. Total trihalomethanes – Potential effect: Cancer

These are three of the 10 contaminants analyzed by the Environmental Working Group (ewg.org).

These 3 contaminants are rated as exceeding EWG Health Guidelines.

See the What Can You Do? section below for all of the contaminants you can filter out and how to do it.

Where does Rapid City’s water come from?

Rapid City’s water comes from the Cyclone Ditch – Rapid Creek watershed.

Both EPA assessed water sources in the Cyclone Ditch – Rapid Creek watershed are in Impaired condition. These are two sections of Rapid Creek.

Ideally, a water source would be rated in Good condition.

Whether a water source is in Impaired or Good condition refers to the quality of these uses:

  1. Drinking Water
  2. Aquatic Life
  3. Fish and Shellfish Consumption
  4. Recreation

Learn more from How’s My Waterway

See below for what you can do to improve Rapid City’s water.

Conclusion – What Can You Do?

Information about water quality can be surprising.

But there’s no reason to lose hope. There are things you can do in your household as well as things you can do at a community level.

In Your Household:

  • Use Berkey filters with activated carbon to filter out 7 of the 10 contaminants in your drinking water.
    • Berkey filters can also remove up to 99.99% of Lead in Rapid City water.
    • Brita can filter 1 contaminant (and Lead depending on the filter).
    • Note: We may receive a commission if you decide to purchase filters through links on this page.
  • To filter out 7 of the 10 contaminants in your whole house, consider a Reverse Osmosis water filtration system for your home.

*Chlorination is an effective method of disinfecting/treating drinking water. You can then use a water filter to reduce the effects of chlorination byproducts to get the safest, cleanest water possible.

In Your Community:

Contact your local government officials and put pressure on them to invest in cleaner waterways and upgraded city water filtration and treatment.

Go to: https://www.rcgov.org/government.html to find contact information for your local officials.

Water Quality in Other South Dakota Cities

South Dakota Water Quality Page

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