OHA Drinking Water Services
OHA Drinking Water Services
Contact Report Details

PWS ID: OR41 00454
Who Was Contacted: Karen Howten
Contact Phone: -- (Email address hidden)
Contact Date: 10/14/2022
Contact Method/Location: Email
Reasons: Coliform
Details: Emailed Karen the following:

Good afternoon Mrs. Howton,

I stopped by your office to talk about the recent positive coliform water samples. Because both samples were positive it will be a bit different than normal repeat water sampling. You will need to have the following done:
1. Provide three repeat samples from either test site.
2. Provide a source sample from each well that was in use at the time of the positive water samples
3. Complete the L1 Coliform investigation form I provided to your office staff and send it to my office. This was required because both positive samples were identified in the same month

FYI, this is the second L1 investigation in three months. There is the risk that you can be required to chlorinate. According to OAR 333-061-0032(6)(g), If a system has had 3 or more coliform investigations triggered within a rolling 12-month period, or 4 or more coliform investigations triggered within a rolling 2-year period, then the system must install chlorination for residual maintenance within 6 months, or on a schedule agreed upon by the Regulating Agency. Note: coliform investigations triggered by failure to collect repeats do not count in this determination (Summarized).


Ryan Zastrow, REHS
Union County Environmental Health
Center for Human Development, Inc.
Associated Alerts: COLI22734 - 10/14/2022 - COLIFORM (TCR)   See also: 10/14/2022

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