Drinking Water Regulations
Voluntary Notice of Elevated Drinking Water Atrazine Levels
The Missouri Department of Natural Resources has notified the City of Concordia that the recent drinking water test for Atrazine had a level of 6.31 micrograms per liter (or parts per billion(ppb)). Atrazine is an herbicide used to kill weeds, primarily on farms. This single sample does not mean the city exceeded the maximum contaminant level (MCL), but we want to keep our customers informed of the results. This is not an emergency. However, some people who drink water containing atrazine in excess of the MCL over MANY YEARS could experience problems with their cardiovascular system or reproductive difficulties.
The U.S. Environmental Protection Agency (EPA) has established the MCL for Atrazine at 0.003 mg/l (or 3 ppb) as a running annual average. A sample is collected each calendar quarter, and the results of the most recent four quarters are averaged together. Concordia's current running average result is 1.88 ppb.
Atrazine is a type of weed killer, typically used on corn and soybean crops to increase yield and decrease the effects of broad leaf and grass type weeds.
Increasing Carbon during the planting season is pretty typical each year, however, this year we couldn't have anticipated the large rains we've had earlier in the year. Additionally, our watershed is very large and heavy rains will bring any and all soil runoff into Pape Lake.
You do not need to use an alternative water supply. However, if you have health concerns, you may want to talk to your doctor to get more information about how this may affect you.
We are working to lower the Atrazine levels as expeditiously as possible. We are currently feeding more carbon to lower the levels of Atrazine in the water. We are working with our chemists and engineers to maximize our plants effectiveness in lowering Atrazine levels in the water supply.
Thank you for your confidence in our staff to supply safe and clean water for your consumer needs.
For further information contact:
City of Concordia-Water Treatment Plant, Joseph Boynton, Superintendent