OHA Drinking Water Services
OR41
PWS ID: 00869 ---- THE DALLES, CITY OF
Lead & Copper

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Detailed Results
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90th Percentile Summary Results

Sample Dates Date
Received		 Sample
Count		 Frequency Lead
(mg/L)		 Copper
(mg/L)		 Consumer
Notice Date
7/9/2024  -  7/12/20247/25/2024 36 3 years 0.0008 0.140
7/20/2021  -  7/22/20218/9/2021 32 3 years 0.0014 0.120
7/25/2018  -  7/26/20188/9/2018 34 3 years 0.0012 0.120
7/14/2015  -  7/16/20157/31/2015 32 3 years 0.0013 0.091
8/1/2012  -  8/14/201212/10/2012 31 3 years 0 0.090
7/14/2009  -  7/21/20099/9/2009 33 3 years 0 0.140
8/23/2006  -  8/28/20069/11/2006 30 3 years 0.0050 0.150
8/11/2003  -  8/22/200310/6/2003 30 3 years 0 0.280
7/1/2000  -  8/8/20009/26/2000 30 3 years 0 0.306
1/1/1997  -  8/20/199710/8/1997 30 1 year 0.0024 0.456
1/1/1996  -  9/10/19969/30/1996 30 1 year 0 0.600
1/1/1995  -  9/12/199510/12/1995 30 1 year 0 0.190
1/1/1994  -  2/15/19947/1/1994 60 6 months 0 0.470
1/1/1993  -  12/1/19931/4/1994 60 6 months 0 0.510
1/1/1993  -  6/6/19937/6/1993 60 6 months 0.0029 1.860
7/1/1992  -  12/5/19921/5/1993 60 6 months 0 0.480


More information for this water system: SDWIS ID 3916
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