OAR 333-061-0540
Cyanotoxin Monitoring

(1) Water suppliers with raw water intakes into susceptible sources must monitor as follows:
(a) At raw water sampling points:
(A) From May 1 through October 31, water suppliers must monitor at the raw water sampling point at least once every two weeks for cyanotoxins. Samples from upstream locations collected for recreational or other purposes may be substituted for raw water sampling if approved by the Authority based on proximity and characteristics of sampling locations, sampling techniques and analytical methods used, and intake construction.
(B) If at any time either total microcystins or cylindrospermopsin concentration in raw water are greater than or equal to 0.3 µg/L, or there is a recreational use health advisory in a water body upstream, water suppliers must immediately increase raw water monitoring of cyanotoxins to weekly.
(C) Water suppliers may resume raw water monitoring every two weeks if there is not a recreational use health advisory upstream and cyanotoxin levels are less than 0.3 µg/L in at least two consecutive weekly samples.
(b) At entry points:
(A) If a cyanotoxin concentration is greater than or equal to 0.3 µg/L at the raw water sampling point, water suppliers must monitor for cyanotoxins at the entry point weekly, beginning within one business day of receiving raw water results.
(B) If cyanotoxins are detected at any entry point sample, water suppliers must immediately take steps to optimize existing facilities or treatment processes to reduce cyanotoxins and begin monitoring at the entry point daily beginning within 24 hours of notification of results.
(C) Water suppliers may resume weekly entry point monitoring if cyanotoxins are not detected in two consecutive daily samples collected at the entry point.
(D) Water suppliers may cease entry point monitoring if the results from two consecutive samples of the raw water are less than 0.3 µg/L and is not detected in two consecutive entry point or distribution samples.
(2) Monitoring following a cyanotoxin health advisory level exceedance at entry point.
(a) If the cyanotoxin concentration exceeds a health advisory level in a sample collected at the entry point, the water supplier must collect a confirmation sample from the entry point as soon as practical, but no later than 24 hours after receiving results.
(b) At water systems where a health advisory is in effect, water suppliers must sample in the distribution system according to OAR 333-061-0570 (Public Notification)(4) in order for the health advisory to be lifted. Additional distribution system monitoring may be required by the Authority based on sampling results and other relevant circumstances. Distribution monitoring may cease when the advisory is lifted.
(c) Once the health advisory is lifted as permitted under OAR 333-061-0570 (Public Notification)(4), water suppliers must monitor no less frequently than prescribed in section (2) of this rule.
(3) The Authority may extend the monitoring timeline required pursuant to this rule on a case-by-case basis upon a request from a water supplier, when the water supplier has a logistical problem timely collecting or analyzing samples in accordance with the requirements of OAR 333-061-0510 (Applicability of Cyanotoxin Rules) to 333-061-0580 (Record Keeping). When an extension is approved by the Authority, the Authority must specify in writing how much time the water supplier has to monitor. Examples of logistical problems could include, but are not limited to:
(a) Extreme weather conditions that create unsafe travel or on-site conditions for the person collecting the sample.
(b) Limited laboratory capacity on weekends and holidays.

Source: Rule 333-061-0540 — Cyanotoxin Monitoring, https://secure.­sos.­state.­or.­us/oard/view.­action?ruleNumber=333-061-0540.

333‑061‑0005
Purpose 333‑061‑0010
Scope 333‑061‑0015
Adoption by Reference 333‑061‑0020
Definitions 333‑061‑0025
Responsibilities of Water Suppliers 333‑061‑0030
Maximum Contaminant Levels and Action Levels 333‑061‑0031
Maximum Residual Disinfectant Levels 333‑061‑0032
Treatment Requirements and Performance Standards for Surface Water, Groundwater Under Direct Influence of Surface Water, and Groundwater 333‑061‑0034
Treatment Requirements and Performance Standards for Corrosion Control 333‑061‑0036
Sampling and Analytical Requirements 333‑061‑0040
Reporting and Record Keeping 333‑061‑0042
Public Notice 333‑061‑0043
Consumer Confidence Reports 333‑061‑0045
Variances 333‑061‑0046
Permits 333‑061‑0050
Construction Standards 333‑061‑0055
Waivers from Construction Standards 333‑061‑0057
Voluntary Drinking Water Protection Program 333‑061‑0060
Plan Submission and Review Requirements 333‑061‑0061
Capacity Requirements for Public Water Systems 333‑061‑0062
Land Use Coordination 333‑061‑0063
Environmental Review Process for The Safe Drinking Water Revolving Loan Fund Program 333‑061‑0064
Emergency Response Plan Requirements 333‑061‑0065
Operation and Maintenance 333‑061‑0070
Cross Connection Control Requirements 333‑061‑0071
Backflow Prevention Assembly Installation and Operation Standards 333‑061‑0072
Backflow Assembly Tester Certification 333‑061‑0073
Cross Connection Specialist Certification 333‑061‑0074
Cross Connection Training Programs, Course, and Instructor Requirements 333‑061‑0075
Sanitary Surveys of Watersheds 333‑061‑0076
Sanitary Surveys 333‑061‑0077
Composite Correction Program & Comprehensive Performance Evaluations 333‑061‑0078
Coliform Investigations 333‑061‑0080
Role of Counties 333‑061‑0085
Supplemental Fluoridation 333‑061‑0087
Product Acceptability Criteria 333‑061‑0089
Annual Water System Fee 333‑061‑0090
Penalties 333‑061‑0095
Severability 333‑061‑0097
Adverse Health Effects Language 333‑061‑0098
References 333‑061‑0210
Operator Certification: Scope 333‑061‑0220
Classification of Water Treatment Plants and Water Distribution Systems 333‑061‑0225
General Requirements Applying to Water Suppliers and Water Systems 333‑061‑0228
Certification Requirements for Small Water System Operators 333‑061‑0230
Contracting For Services 333‑061‑0232
General Requirements Applying to Water System Operators 333‑061‑0235
Operator Certification Requirements, Levels 1–4 333‑061‑0245
Applications for Certification Levels 1–4 333‑061‑0250
Examinations for Certification, Levels 1–4 333‑061‑0260
Certificate Renewal Levels 1–4 333‑061‑0265
Fees 333‑061‑0270
Refusal, Suspension, or Revocation of Certification 333‑061‑0272
Suspension of Certification 333‑061‑0305
Domestic Well Program: Purpose 333‑061‑0310
Scope 333‑061‑0324
Area of Public Health Concern 333‑061‑0325
Domestic Well Tests 333‑061‑0330
Accredited Laboratories 333‑061‑0335
Sample Collection 333‑061‑0400
Reducing Lead in School Drinking Water 333‑061‑0510
Applicability of Cyanotoxin Rules 333‑061‑0520
Definitions 333‑061‑0530
Health Advisory Levels 333‑061‑0540
Cyanotoxin Monitoring 333‑061‑0550
Analytical Methods 333‑061‑0560
Reporting 333‑061‑0570
Public Notification 333‑061‑0580
Record Keeping
Last Updated

Jun. 8, 2021

Rule 333-061-0540’s source at or​.us