OHA Drinking Water Services
OR41
PWS ID: 06118 ---- COLUMBIA HILLS HOA
Lead & Copper

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Detailed Results
Corrosion Control
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90th Percentile Summary Results

Sample Dates Date
Received		 Sample
Count		 Frequency Lead
(mg/L)		 Copper
(mg/L)		 Consumer
Notice Date
7/30/2024  -  8/1/202410/8/2024 5 6 months 0.0010 0.284
9/27/2023  -  9/28/202310/9/2023 5 6 months 0.0050 0.139
9/30/2022  10/10/2022 3 3 years 0.0020 0
9/27/2020  -  9/28/202010/6/2020 5 3 years 0.0010 0.348
6/15/2017  -  6/28/20178/9/2017 5 1 year 0.0019 1.130
9/3/2016  -  9/27/201610/11/2016 5 1 year 0.0052 0.449
8/26/2015  -  8/30/201510/2/2015 5 1 year 0.0024 0.920
9/14/2014  -  9/16/201410/29/2014 5 6 months 0.0024 0.496
8/3/2013  -  8/8/20139/3/2013 5 6 months 0.0045 0.067
3/20/2013  -  3/30/20135/17/2013 5 6 months 0 0.041
9/18/2012  -  9/23/201210/29/2012 5 6 months 0.0052 0.089
5/5/2012  -  5/8/20126/6/2012 5 6 months 0.0028 0.062
8/30/2010  9/15/2010 6 6 months 0.0006 0.007
6/29/2009  7/15/2009 5 6 months 0.0040 0.135


More information for this water system: SDWIS ID 4836
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