On this page:

• Water System Sampling Points
• Coliform Monitoring
• Turbidity and Surface Water Treatment
• Disinfection Byproducts (DBPs)
• Maximum Residual Disinfectant Levels
• Chemical Monitoring
• Arsenic
• Radionuclides
• Lead and Copper

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Water System Sampling Points

• Where to Take Samples-Groundwater Systems (pdf)
• Where to Take Samples-Surface Water Systems (in development)

Coliform Monitoring

• Groundwater Rule
• A Small Systems Guide to the Total Coliform Rule (pdf)
• Coliform Bacteria (pdf)
• Coliform Monitoring Frequencies for All Systems (pdf) [Temporarily unavailable]
• How to Interpret Coliform Test Results (pdf) [Temporarily unavailable]
• How to Develop a Coliform Sampling Plan -- Summer 2009 Pipeline (pdf)
• How to disinfect a well (pdf)
• Proper Microbiological Sampling Techniques (pdf) [Temporarily unavailable]
• Turbidity and Coliform monitoring frequencies for all Systems (pdf)
• Coliform Sampling Plan Template for Small Public Water Systems Serving Up to 1,000 Persons: fillable MS Word -or- PDF
  
  • Updated sampling plan templates incorporate the source water monitoring requirements of the Groundwater Rule.
  • Source water monitoring requirements are effective for Groundwater Systems beginning December 1, 2009.
• Shock Chlorination for Storage Tank, Well, and Distribution System - Procedure and Volume Calculation

Turbidity and Surface Water Treatment

• Turbidity and Coliform Monitoring Requirements of All Systems (pdf)
• Surface Water Monitoring and Reporting Forms for CT and Turbidity Data:
  
  If your system has more than one chlorine injection point, or if you have questions about the PDF or MS Excel versions of the monthly turbidity and surface water monitoring forms, contact the Drinking Water Services technical oversight contact for your system at 971-673-0405.
  • Conventional or Direct Filtration: PDF -or- MS Excel
  • Slow Sand, Membrane, Diatomaceous Earth Filtration or Unfiltered: PDF -or- MS Excel
  • Cartridge or Bag Filtration: PDF -or- MS Excel
• Preparing a Tracer Study Plan (pdf)
• Tracer Study Reporting Form (MS Excel): The template allows a water system to conduct a tracer study to comply with disinfection by determining effective contact time through a storage reservoir.
• EPA Quick Reference Guides:
  
  • Interim Enhanced Surface Water Treatment Rule: A Quick Reference Guide (pdf)
  • Long Term 1 Enhanced Surface Water Treatment Rule: A Quick Reference Guide (pdf)
  • Filter Backwash Recycling Rule: A Quick Reference Guide (pdf)

Disinfection Byproducts (DBPs)

• Stage 2 Disinfection Byproducts Rule Web Page
• EPA Comprehensive Stage 1/Stage 2 Quick Reference Guide (pdf)
• EPA DBP Web Page
• EPA Chloramine Web Page

Maximum Residual Disinfectant Levels

Maximum Residual Disinfectant Level Report (MRDL) Form: Download and use this form to report MRDL samples collected in the distribution system to Drinking Water Services.

Chemical Monitoring

New sampling requirements have been added for disinfection byproducts and radionuclides that may affect your water system. Please consult the fact sheets below for further information:

• Community and Non-Transient Water Systems (pdf)
• Purchasing Community and Non-Transient Water Systems (pdf) [Temporarily unavailable]
• Transient Non-community and State Regulated Water System (pdf)
• Chemical Contaminants and Maximum Levels (pdf)
• Chemical Monitoring Reduction Request Form (pdf)
• SOC Use Waiver Guidance (pdf)

Arsenic

• EPA Arsenic and Clarifications to Compliance and New Source Monitoring Rule: A Quick Reference Guide (pdf)

Radionuclides

• EPA Radionuclides in Drinking Water Web Page
• EPA Radionuclides Rule: A Quick Reference Guide (pdf)
• EPA Technical Fact Sheet: Final Rule (for Non-Radon) Radionuclides in Drinking Water

Lead and Copper

• Corrosion Control Treatment (i.e., Lead and Copper Rule) Reporting Forms
  
  • EPA Lead and Copper Rule Quick Reference (pdf)
  • EPA Revised Guidance Manual for Selecting Lead and Copper Control Strategies (pdf)
  • Reporting Form for Water System Entry Point (pdf)
  • Reporting Form for Water System Distribution (pdf)
  • Monitoring and Reporting Form Instructions (pdf)
• Lead and Copper Reporting and Monitoring Guidance: Use Amended Form 141-A for sample site identification for lead and copper sampling. Form submission is only required when there is a change in routine lead/copper sampling locations. The two-page form is available on pages 117‑118 of EPA Lead and Copper Rule Monitoring and Reporting Guidance for Public Water Systems (pdf).
• Lead Testing: EPA's Lead in Drinking Water in Schools and Non-Residential Buildings manual describes how drinking water can be tested for lead and how contamination problems can be corrected. This manual is intended for use by school officials responsible for the water system maintenance and/or safety. Revised technical guidance is available in EPA's 3Ts for Reducing Lead in Drinking Water in Schools (pdf). For more information about lead poisoning, please contact the Oregon Lead Poisoning Prevention Program (ph. 971-673-0440).