Agenda - Council Work Session - 07/23/2019

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CC Work Session 2, 3, Meeting Date: 07/23/2019 Information Title: Receive Update on Public Water Supply and Manganese Levels Purpose/Background: The purpose of this case is to update the council on the latest round of manganese testing of our municipal water system performed by the utility department. On July loth staff from the utility department took 10 random samples of water from our system and had the analyzed by an independent lab for manganese concentration. All 10 samples came back below the 100 ppb (parts per billion) recommended for bottle fed infants under 12 months of age. The manganese level is starting to increase slightly with 3 of the samples registering in the range of 96-97 ppb. Wells #5, #6 and #7 are our lowest manganese producing wells and are still supplying the bulk of our water, but well# 8 (228 ppb) is being used more frequently in the month of July, because of the increase in demand. Currently well # 8 is pumping about 1 million gallons of water a day. Staff will present a draft copy of the map we plan on using to show the public the general areas we tested for manganese and the concentrations in that area. After receiving comments from the council, we will update the map as needed and have it available electronically on our web site.The purpose of this case is to update the council on the latest round of manganese testing of our municipal water system performed by the utility department. Please note that this is a slight repeat of Staff Input at the last Public Works Committee. This is an opportunity for the full Council to discuss in more detail and receive further update based on Council inquiries. Timeframe: 5 Minutes Funding Source: Utility Fund 9601 Responsible Party(ies): Public Works Staff Outcome: Informational only, monthly update to council No file(s) attached. Attachments Form Review Inbox Reviewed By Date Brian Hagen Grant Riemer 07/18/2019 01:39 PIMI Grant Riemer (Originator) Grant Riemer 07/18/2019 01:42 PM