OHA Drinking Water Services
OR41
PWS ID: 00660 ---- WEST SLOPE WATER DISTRICT
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
6/1/2025  -  6/12/20257/9/2025 98 1 year 0.0049 0.145
6/16/2024  -  6/28/20248/8/2024 101 1 year 0.0044 0.140
8/6/2023  -  8/24/20239/8/2023 113 6 months 0.0077 0.168
5/15/2023  -  5/26/20237/10/2023 104 6 months 0.0061 0.150
10/1/2022  -  10/14/202212/9/2022 108 6 months 0.0117 0.171
3/19/2022  -  3/31/20225/9/2022 112 6 months 0.0110 0.280
10/12/2021  -  10/22/202111/30/2021 104 6 months 0.0210 0.240 12/17/2021
4/10/2021  -  4/23/20216/9/2021 114 6 months 0.0109 0.270
10/7/2020  -  10/17/202012/10/2020 120 6 months 0.0138 0.262
4/2/2020  -  4/17/20206/9/2020 118 6 months 0.0130 0.270
10/2/2019  -  10/16/201912/9/2019 105 6 months 0.0116 0.216
4/10/2019  -  4/19/20196/7/2019 110 6 months 0.0131 0.269
10/7/2018  -  10/19/201812/7/2018 121 6 months 0.0119 0.216
4/8/2018  -  4/20/20186/7/2018 118 6 months 0.0126 0.221
9/25/2017  -  11/14/20171/8/2018 135 6 months 0.0170 0.252 11/15/2017
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 11/1/2016
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
3/23/2012  -  5/23/20125/9/2022 113 6 months 0.0100 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
5/17/2007  -  6/1/20077/10/2007 116 6 months 0.0130 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
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
1/1/1993  -  4/20/19935/20/1993 60 6 months 0.0370 1.340
7/1/1992  -  11/29/199212/29/1992 60 6 months 0.0390 1.157


More information for this water system: SDWIS ID 4062
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