OHA Drinking Water Services
OR41
PWS ID: 00457 ---- LAKE OSWEGO MUNICIPAL WATER
Lead & Copper

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Summary Results
Detailed Results
Corrosion Control
Service Lines
90th Percentile Summary Results

Sample Dates Date
Received		 Sample
Count		 Frequency Lead
(mg/L)		 Copper
(mg/L)		 Consumer
Notice Date
6/5/2023  -  8/4/20238/15/2023 47 3 years 0 0
6/17/2020  -  7/8/20207/22/2020 30 3 years 0.0015 0.042 8/11/2020
6/27/2017  -  8/4/20178/17/2017 31 3 years 0.0030 0.039
4/30/2014  -  6/16/20147/10/2014 60 6 months 0.0030 0.031
10/8/2013  -  12/19/201312/30/2013 63 6 months 0.0040 0.063
6/20/2011  -  7/18/20118/24/2011 30 3 years 0 0
6/4/2008  -  7/1/20088/21/2008 31 3 years 0.0040 0.050
6/2/2005  -  7/18/20058/1/2005 30 3 years 0.0050 0.200
4/4/2002  -  4/25/20028/2/2002 35 3 years 0.0090 0.320
1/1/1999  -  3/19/19994/21/1999 60 6 months 0.0060 0.550
1/1/1998  -  8/29/199812/16/1998 30 6 months 0.0080 0.390
1/1/1993  -  2/23/19933/23/1993 60 6 months 0.0160 0.254
7/1/1992  -  12/4/19921/4/1993 60 6 months 0.0190 0.250


More information for this water system: SDWIS ID 4106
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