OHA Drinking Water Services
OR41
PWS ID: 00906 ---- TUALATIN, CITY OF
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
6/23/2025  -  6/27/20257/17/2025 41 1 year 0.0049 0.128
9/16/2024  -  9/18/20249/27/2024 47 1 year 0.0076 0.114 10/3/2024
12/4/2023  -  12/7/202312/20/2023 63 6 months 0.0100 0.117 1/4/2024
5/22/2023  -  5/24/20236/22/2023 67 6 months 0.0050 0.077 6/29/2023
10/10/2022  -  10/18/202211/3/2022 64 6 months 0.0100 0.120 11/10/2022
8/17/2021  -  8/24/20219/7/2021 53 1 year 0.0150 0.316 9/14/2021
8/17/2020  -  8/20/20209/8/2020 59 1 year 0.0120 0.225 9/11/2020
4/8/2019  -  4/12/20195/22/2019 63 6 months 0.0120 0.154 5/17/2019
10/15/2018  -  10/23/201812/17/2018 67 6 months 0.0120 0.167 12/7/2018
4/9/2018  -  4/17/20185/18/2018 67 6 months 0.0170 0.159 6/4/2018
10/16/2017  -  10/25/20171/4/2018 70 6 months 0.0160 0.159 12/5/2017
4/11/2017  -  4/25/20176/13/2017 112 6 months 0.0145 0.190 5/12/2017
10/15/2016  -  10/26/201611/18/2016 112 6 months 0.0174 0.310
3/15/2016  -  4/27/20166/10/2016 114 6 months 0.0130 0.288
10/26/2015  -  11/12/20151/8/2016 114 6 months 0.0141 0.336
4/28/2015  -  5/12/20157/10/2015 112 6 months 0.0141 0.326
9/30/2014  -  10/15/201412/10/2014 114 6 months 0.0142 0.335
1/7/2014  -  5/27/20147/10/2014 111 6 months 0.0128 0.293
11/9/2013  -  11/18/20131/10/2014 108 6 months 0.0159 0.500
5/8/2013  -  5/21/20137/10/2013 111 6 months 0.0100 0.270
10/10/2012  -  10/23/20121/9/2013 112 6 months 0.0120 0.340
5/9/2012  -  5/23/20127/10/2012 112 6 months 0.0110 0.270
10/11/2011  -  10/24/201112/8/2011 111 6 months 0.0120 0.290
4/27/2011  -  5/17/20117/7/2011 114 6 months 0.0090 0.270
10/14/2010  -  10/22/20101/7/2011 112 6 months 0.0120 0.340
4/2/2010  -  5/10/20107/8/2010 110 6 months 0.0100 0.330
10/14/2009  -  10/26/20091/8/2010 115 6 months 0.0090 0.370
5/8/2009  -  5/21/20097/9/2009 113 6 months 0.0100 0.270
7/1/2008  -  12/31/20081/9/2009 116 6 months 0.0100 0.330
11/17/2007  -  12/7/20071/10/2008 111 6 months 0.0110 0.280
10/19/2006  -  11/2/20061/10/2007 116 6 months 0.0170 0.500
5/22/2006  -  5/26/20067/10/2006 117 6 months 0.0090 0.310
10/15/2005  -  10/31/200512/9/2005 115 6 months 0.0120 0.350
5/18/2005  -  6/1/20057/8/2005 119 6 months 0.0150 0.390
10/19/2004  -  11/22/200412/30/2004 111 6 months 0.0150 0.042
5/2/2004  -  6/25/20047/9/2004 123 6 months 0.0080 0.360
10/21/2003  -  11/4/200312/10/2003 110 6 months 0.0080 0.330
5/10/2003  -  6/30/20037/11/2003 113 6 months 0.0104 0.345
10/23/2002  -  11/3/20021/10/2003 147 6 months 0.0170 0.500
5/6/2002  -  5/21/20027/10/2002 133 6 months 0.0130 0.420
11/9/2001  -  11/22/20011/8/2002 134 6 months 0.0200 0.810
5/10/2001  -  5/22/20017/9/2001 144 6 months 0.0170 0.620
9/14/2000  -  9/22/20001/10/2001 124 6 months 0.0220 0.710
4/7/2000  -  5/22/20007/10/2000 125 6 months 0.0150 0.660
10/19/1999  -  11/1/19991/13/2000 126 6 months 0.0120 0.600
5/12/1999  -  6/6/19997/8/1999 126 6 months 0.0210 0.640
11/5/1998  -  11/17/19981/13/1999 127 6 months 0.0190 0.660
5/7/1998  -  5/29/19987/9/1999 129 6 months 0.0150 0.670
11/9/1997  -  11/21/19971/9/1998 129 6 months 0.0130 0.680
5/24/1997  -  6/5/19977/16/1997 130 6 months 0.0120 0.650
7/1/1992  -  8/17/19929/17/1992 60 6 months 0.0430 0.853


More information for this water system: SDWIS ID 4081
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