OHA Drinking Water Services
OR41
PWS ID: 05117 ---- DARK HOLLOW WATER ASSOCIATION
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
7/1/2022  7/18/2022 5 3 years 0.0031 0.019
5/22/2019  -  5/23/20196/10/2019 5 6 months 0.0011 0.123
11/18/2018  -  11/19/201811/29/2018 5 6 months 0.0046 0.072
5/10/2018  -  5/15/20185/22/2018 5 6 months 0.0009 0.042
12/6/2017  -  12/9/201712/21/2017 5 6 months 0.0007 0.036


More information for this water system: SDWIS ID 174
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