South Carolina Department of Health and Environmental Control

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Calculating the Amount a Treatment Device Can Remove

If you want to calculate how much uranium or radon can be removed from your drinking water by one of the types of treatment systems we have tested, you can calculate the approximate removal by using the overall average removal rates listed above. An example is included for illustration:

Your uranium level is reported at 250 ug/L and the radon is 12,000 pCi/L.

Using the Reverse Osmosis system for uranium – 250 x 0.999 (which is 99.9%) = 249.75 ug/L of uranium removed

Therefore, the approximate amount of uranium remaining in your water after treatment by a reverse osmosis system is : 250 – 249.75 = 0.25 ug/L which is well below the MCL of 30 ug/L.

For radon (also using reverse osmosis) --

12,000 x 0.976 = 11,712 pCi/L of radon removed

Therefore, the approximate amount of radon remaining in your water after treatment by a reverse osmosis system is : 12,000 – 11,712 = 288 pCi/L, which is slightly below the proposed MCL of 300 pCi/L.

For additional information, contact:  E-mail  (803) 898-3300  Fax (803) 898-3300