OHA Drinking Water Services
Contact Report Details
|PWS ID:||OR41 00911|
|PWS Name:||TOOLEY WATER DISTRICT|
|Who Was Contacted:||John Amery|
|Contacted By:||CIVIL WEST ENGINEERS, INC (DWP)|
|Assistance Type:||CIRCUIT RIDER ASSISTANCE|
Tooley Water District (TWD) is a small groundwater system on the Columbia River in Wasco County. One of their two wells just tested at 18.6 mg/L for nitrate in Well #1 and 20 mg/L in Well #2. The MCL for nitrate is 10 mg/L.
The circuit rider reached out to John Amery of TWD on 10/22/20 to provide assistance. To address TWD’s three concerns, we recommend the following:
• Identify the source of the nitrate
Given the lack of an upper confining layer, the shallow depth of both wells, and the extreme proximity to agricultural activity, the source of the nitrate is said agricultural activity.
• Develop a short term solution
The short term solution is to notify all users of the nitrate issue. This should have already been done via door-hangers, phone calls, and/or posting on the water district website. Currently there is no short term method to mitigate a nitrate issue without installation of equipment to remove the nitrate.
• Develop a long term solution
TWD has a history of elevated nitrate in their raw well water. The nitrates are most likely coming from local agricultural activity and would be difficult to fully mitigate even if the fertilization ceased.