OHA Drinking Water Services
OR41
PWS ID: 00937 ---- WELCHES WATER COMPANY
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
6/15/2021  6/22/2021 5 3 years 0.0014 0.015
8/4/2020  8/12/2020 5 6 months 0.0014 0.082
6/21/2019  7/18/2019 5 6 months 0 0.035
8/9/2018  8/20/2018 5 6 months 0.0016 0.301
9/20/2017  10/4/2017 5 6 months 0.0374 0.453
7/18/2016  8/3/2016 5 3 years 0.0235 0.345
9/12/2013  -  9/18/20139/30/2013 5 3 years 0.0049 0.486
6/17/2009  -  6/18/20097/14/2009 5 3 years 0.0010 0.195
1/1/1999  -  12/14/19996/25/2002 5 1 year 0.0047 0.176
1/1/1997  -  12/20/19971/23/1998 5 1 year 0.0070 0.580
1/1/1995  -  7/10/19959/21/1995 5 1 year 0.0080 1.000
1/1/1994  -  6/21/19946/30/1994 5 6 months 0.0100 0.900
7/1/1993  -  10/23/199312/27/1993 5 6 months 0.0110 0.870


More information for this water system: SDWIS ID 3477
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