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OR41
PWS ID: 00356 ---- GRASS VALLEY WATER SYSTEM
Lead & Copper

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Corrosion Control
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90th Percentile Summary Results

Sample Dates Date
Received		 Sample
Count		 Frequency Lead
(mg/L)		 Copper
(mg/L)		 Consumer
Notice Date
8/3/2025  -  8/5/20258/28/2025 5 3 years 0.0004 0.061
8/26/2022  -  8/29/202210/10/2022 5 3 years 0.0045 0.052
8/22/2019  -  8/24/20199/6/2019 5 3 years 0.0011 0.095
7/5/2016  -  7/7/20167/21/2016 5 3 years 0.0003 0.077
9/3/2013  9/11/2013 5 3 years 0.0006 0.072
8/31/2010  10/7/2010 5 3 years 0.0008 0.079
12/28/2006  1/9/2007 5 3 years 0 0
3/1/2001  -  3/7/20017/9/2002 5 1 year 0.0070 0.070
1/1/1997  -  12/9/19974/2/1998 5 1 year 0.0007 0.085
1/1/1995  -  11/14/19954/2/1998 5 1 year 0 0
1/1/1994  -  3/23/19945/9/1995 10 6 months 0.0050 0
7/1/1993  -  7/20/19939/2/1993 10 6 months 0.0010 0


More information for this water system: SDWIS ID 3321
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