OHA Drinking Water Services
OHA Drinking Water Services
Contact Report Details

PWS ID: OR41 00213
Who Was Contacted and Phone: Kevin Urban
Contact Date: 03/27/2013
Contact Method/Location: Office
Reasons: SWTR
Details: SUMMARY: email regarding sampling EP per source DETAILS: City of Coquilles sequential use of two water sources requires that chemical monitoring be conducted representing both sources. This can be done by either: A) sampling each one separately while running (as has been Coqilles historic practice before 2011), or B) sampling water blended from the two sources. The later would require that both Rink Creek and Coquille River water be fed into the water treatment plant (WTP), ideally at equal flows, and sampling conducted once that blended water had worked fully through the treatment plant. If using the later approach, to assure samples represent blended water, at least three WTP volumes should be processed before sampling. For instance, if the flow rate is 1,000 gpm and the flocculation, settling, and filter volumes are 100,000 gallons, then three WTP volumes will be processed after 300 minutes (3 * 100,000 / 1,000 gpm).The chemical analyses involved are VOCs, SOCs, nitrate, IOCs, arsenic, nitrite, and radionuclides. These are the analyses for samples from the entry point. Given the respective sampling schedules, Coquille is behind schedule on nitrate and VOCs. Also, it has been 10 years since the radionuclide analyses were last conducted and should be done this year for the two sources, either individually or blended. ACTION NEEDED: none

For further information on this public water system, click on the area of interest below:
System Info  ::  Report for Lenders  ::  Alerts  ::  Violations  ::  Compliance & Enforcement  ::  Contacts & Advisories  ::  Site Visits  ::  Public Notice
Coliform Summary  ::  Coliform Results  ::  Sampling Schedule for Coliform  ::  Groundwater/GWUDI Source Details  ::  Plan Review  ::  Annual Fee
Chemical Group Summary  ::  Latest Chemical Results  ::  Entry Point Detects  ::  Single Analyte Results 
Chemical Schedule Summary  ::  Chemical Schedule Details
Lead & Copper  ::  Corrosion Control (LCR)  ::  Nitrate  ::  Arsenic  ::  Radionuclides  ::  GWR 4-Log  ::  LT2  ::  Cyanotoxins  ::  PFAS
DBPs  ::  TOC & Alkalinity  ::  DBP Sample Sites  ::  FANLs  ::  MRDL  ::  Turbidity  ::  SWTR  ::  RAA  ::  LRAAFor SDWIS: 3882

Information by county:
Inventory  ::  Surface Water Systems  ::  Water System Surveys  ::  Outstanding Performers  ::  Plan Reviews  ::  System Scores  ::  Exceedances
Alerts  ::  Violations  ::  Compliance & Enforcement  ::  Significant Deficiencies  ::  Treatment Plant Inspections  ::  Fluoride
Water Advisories  ::  Contact Reports  ::  Cyanotoxins  ::  PFAS  ::  Post-wildfire VOCs  ::  Public Notices

Inventory List for all Oregon Drinking Water Systems in Excel or printable screen format
Staff/Partner Login

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

Need help? Email Drinking Water Services for assistance.