OHA Drinking Water Services
OR41
PWS ID: 00203 ---- COLUMBIA CITY MUN WATERWORKS
Lead & Copper

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Detailed Results
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90th Percentile Summary Results

Sample Dates Date
Received		 Sample
Count		 Frequency Lead
(mg/L)		 Copper
(mg/L)		 Consumer
Notice Date
9/17/2024  -  9/18/2024 10 3 years 0 0.074
9/17/2024  -  9/18/202410/1/2024 10 3 years 0 0.074
8/31/2021  -  9/8/2021 10 3 years 0 0.086
8/31/2021  -  9/8/202110/5/2021 10 3 years 0.0020 0.086
9/6/2018  -  9/11/2018 10 3 years 0 0.338
9/6/2018  -  9/11/20189/28/2018 10 3 years 0 0.338
9/16/2015  -  9/18/2015 10 3 years 0 0.185
9/16/2015  -  9/18/201510/9/2015 10 3 years 0.0030 0.185
9/11/2012  -  9/12/20129/26/2012 10 3 years 0 0.106
2/13/2009  -  2/17/20093/10/2009 20 6 months 0.0020 0.490
9/23/2008  -  9/24/200811/20/2008 20 6 months 0.0035 0.270
2/22/2007  -  2/27/20074/5/2007 20 6 months 0.0030 0.580
6/29/2006  -  6/30/20067/20/2006 20 6 months 0.0020 0.580
1/1/2000  -  5/17/20006/15/2000 10 1 year 0.0020 1.500
1/1/1994  -  6/14/19945/19/1997 20 6 months 0.0090 3.250
7/1/1993  -  10/22/19931/25/1994 20 6 months 0.0050 1.910


More information for this water system: SDWIS ID 4031
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PFAS data are now located on the Chemical Results page.
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