OHA Drinking Water Services
OR41
PWS ID: 00546 ---- MOUNT VERNON, 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
7/7/2021  7/26/2021 10 3 years 0.0020 0.083
7/10/2018  -  7/11/20187/24/2018 10 3 years 0.0024 0.128
7/7/2015  -  7/9/20157/17/2015 10 3 years 0.0034 0.090
9/4/2012  -  9/5/20129/12/2012 10 3 years 0.0046 0.119
9/9/2009  10/1/2009 10 3 years 0.0120 0.330
9/21/2006  -  9/29/200610/16/2006 10 3 years 0.0050 0.190
9/18/2002  -  3/21/20034/11/2003 10 3 years 0.0040 1.400
1/1/2001  -  5/23/20016/18/2001 10 3 years 0.0090 0.720
1/1/1997  -  9/10/199710/21/1997 10 1 year 0 1.700
1/1/1996  -  10/22/199611/20/1996 10 1 year 0.0068 1.013
1/1/1995  -  9/1/199510/9/1997 10 1 year 0.0120 0.553
1/1/1994  -  5/23/19946/20/1994 20 6 months 0.0012 0.359
7/1/1993  -  9/21/19931/3/1994 20 6 months 0.0052 0.501


More information for this water system: SDWIS ID 3761
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