OAR 333-061-0510
Applicability of Cyanotoxin Rules

(1) Water suppliers are subject to OAR 333-061-0510 (Applicability of Cyanotoxin Rules) to 333-061-0580 (Record Keeping) when they own or operate water systems that:
(a) Are supplied by a surface water source that is determined by the Authority to be susceptible to harmful algal blooms or release of cyanotoxins; or
(b) Are supplied by a groundwater source determined by the Authority to be under the direct influence of a surface water source that is susceptible to harmful algal blooms or release of cyanotoxins; or
(c) Purchase water from another water system that is supplied by a surface water source or a groundwater source determined by the Authority under the direct influence of a surface water that is susceptible to harmful algal blooms or release of cyanotoxins.
(2) A water source is susceptible to harmful algal blooms or release of cyanotoxins if:
(a) One or more harmful algal blooms have been documented or at least one cyanotoxin was previously detected in the water source or other location in a public water system supplied by that water source;
(b) The source or a waterbody upstream of the source is listed in the Oregon DEQ Integrated Report and Clean Water Act Section 303(d) list for not meeting water quality standards for algae and aquatic weeds;
(c) The point of diversion into the water system is downstream of or influenced by another surface water source susceptible to harmful algal blooms or release of cyanotoxins; or
(d) The Authority determines the source is susceptible based on the characteristics of the source, including, but not limited to, slow moving or stagnant water, temperature, available sources of nutrients, water quality data, satellite imagery, presence of microcystin- or cylindrospermopsin-producing genes, or other relevant information.
(3) The Authority may, at its discretion, exempt a water supplier that would otherwise be subject to OAR 333-061-0510 (Applicability of Cyanotoxin Rules) to 333-061-0580 (Record Keeping) if the Authority determines that the water source is not likely to be susceptible to cyanotoxins based on information available to the Authority or based on evidence submitted by the water supplier that includes but is not limited to, water quality data, watershed characteristics, and environmental conditions.

Source: Rule 333-061-0510 — Applicability of Cyanotoxin Rules, https://secure.­sos.­state.­or.­us/oard/view.­action?ruleNumber=333-061-0510 (accessed May 26, 2025).

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

May 26, 2025

Rule 333-061-0510's source at or​.us