OHA Drinking Water Services
OR41
PWS ID: 00724 ---- ST HELENS, CITY OF
Lead & Copper

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90th Percentile Summary Results

Sample Dates Date
Received		 Sample
Count		 Frequency Lead
(mg/L)		 Copper
(mg/L)		 Consumer
Notice Date
6/24/2025  -  8/28/20259/23/2025 30 3 years 0.0010 0.053
7/19/2022  -  9/15/20229/30/2022 30 3 years 0.0030 0.156
7/30/2019  -  9/18/201910/2/2019 30 3 years 0.0020 0.373
8/9/2016  -  9/14/201610/6/2016 30 3 years 0 0.213
9/12/2013  -  9/25/201310/16/2013 30 3 years 0.0030 0.457
8/18/2010  -  8/19/201010/22/2010 30 3 years 0.0020 0.190
1/9/2007  -  1/22/20072/8/2007 60 6 months 0.0020 0.610
6/22/1906  -  7/18/20068/1/2006 60 6 months 0.0030 0.680
1/1/2000  -  4/26/20006/14/2000 30 1 year 0.0030 1.730
1/1/1993  -  2/10/19933/10/1993 60 6 months 0.0060 1.620
7/1/1992  -  11/23/199212/23/1992 60 6 months 0.0170 1.890


More information for this water system: SDWIS ID 4242
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