OHA Drinking Water Services
OR41
PWS ID: 00368 ---- HELIX, 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
7/28/2022  9/19/2022 5 3 years 0.0020 0.007
9/4/2019  10/1/2019 5 3 years 0.0020 0
6/30/2016  7/24/2016 5 3 years 0.0011 0
8/26/2013  10/4/2013 5 3 years 0.0020 0
9/21/2010  11/22/2010 5 3 years 0.0025 0.009
6/26/2007  8/3/2007 5 3 years 0.0005 0.050
6/16/2004  7/7/2004 5 3 years 0 0.015
8/15/2001  8/15/2001 5 1 year 0.0010 0.031
1/1/2000  -  10/11/200010/23/2000 5 1 year 0.0010 0.039
1/1/1996  -  11/18/199612/4/1996 5 1 year 0.0012 0.017
1/1/1994  -  3/9/19943/23/1994 10 6 months 0.0030 0
7/1/1993  -  8/1/19938/9/1993 10 6 months 0.0010 0


More information for this water system: SDWIS ID 3728
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