OHA Drinking Water Services
OHA Drinking Water Services
Contact Report Details

PWS ID: OR41 01139
PWS Name: MIDLAND WATER ASSOCIATION
 
Who Was Contacted and Phone: Scott MacGregor (503) 201-0050
Contact Date: 10/18/2016
Contacted By: NUSRALA, JAMES (REGION 1)
Contact Method/Location: Office
 
Assistance Type: WATER QUALITY ALERT RESPONSE
Reasons: Disinfection Byproducts
N/A
 
Details: SUMMARY: Follow up on HAA5 sample > MCL DETAILS: I spoke to Scott about the 10/5/16 HAA5 (haloacetic acids) sample of 0.10 mg/L, that exceeded the Maximum Contaminant Level of 0.060 mg/L. Consequently, Midland will begin quarterly sampling in the first quarter of 2017, collecting both a TTHM and HAA5 sample during the second month of each quarter (Feb, May, Aug, Nov), so that the association will sample during the peak month of August. Compliance with the MCL is determined by an annual average of 4 quarters. I also communicated to Scott that an Operation Evaluation Level will be determined after 3 quarters of monitoring as a precursor to the MCL determination. System operating normally, still using Graham Creek. The chlorine residual levels were high in late August, around 3 mg/L, due to the chlorine feed pump not being adjusted properly. That has since been fixed and residual levels are in the normal 1 mg/L range for September. ACTION NEEDED: Midland to collect quarterly samples for both TTHM and HAA5 at 79490 Erickson Dike. DWS to determine OEL and MCL compliance. System may revert to annual DBP monitoring when running annual average for TTHM <= 0.060 mg/L and HAA5 <= 0.045 mg/L.
 
Associated Alerts: CHEM7340 - 10/14/2016 - TOTAL HALOACETIC ACIDS (HAA5)



More information for this water system: SDWIS ID 4011
System Info  ::  Report for Lenders  ::  Alerts  ::  Violations  ::  Compliance & Enforcement  ::  Contacts & Advisories  ::  Site Visits  ::  Public Notice
Coliform Summary  ::  Coliform Results  ::  Coliform Schedules  ::  LT2  ::  GW/GWUDI Source Details  ::  Plan Review  ::  Annual Fee
Chemical Summary  ::  Chemical Results  ::  Chemical Schedules  ::  Chemical Schedule Summary  ::  Arsenic RAA  ::  Cyanotoxins  ::  PFAS
Lead & Copper  ::  DBP Sample Sites  ::  FANLs  ::  MRDL  ::  GWR 4-Log  ::  Turbidity  ::  SWTR  ::  LRAA  ::  DW Source Protection
New! Visit our new Drinking Water Source Protection page.

Information for all water systems:
Water System Inventory  ::  Water System Surveys  ::  Outstanding Performers  ::  Treatment Plant Inspections  ::  Treatment  ::  Plan Reviews
Alerts  ::  Violations  ::  Compliance & Enforcement  ::  Deficiencies  ::  System Scores  ::  Exceedances  ::  Public Notices  ::  Service Lines
Water Advisories  ::  Contact Reports  ::  Cyanotoxins  ::  PFAS  ::  Post-wildfire VOCs  ::  Fluoride  ::  Certification List  ::  DW Source Protection

Introduction  ::  Data Search Options  ::  Water System Search  ::  DWS Home  ::  DWS Rules

Need help? Email Drinking Water Services for assistance.Staff/Partner Login