Coliform Bacteria
(DEQ Fact Sheet: pdf 41 kb, 1 page)

Filter Backwash Recycling Rule (FBRR), Implementation Guidance for
(DEQ Publication, May 2003: pdf 102 kb, 13 pages)

Explains requirements of the rule and provides an implementation timetable. Applicable to all public water systems that use surface water or ground water under the direct influence of surface water as a source. Note: Applies only to systems that employ conventional or direct filtration and recycle spent filter backwash water, thickener supernatant, or liquids from dewatering processes.

How to Demonstrate Financial, Technical, and Managerial Capacity in New Public Water Systems, Program Guidance on

(DEQ Publication, April 1999: pdf 89 kb, 37 pages)

Provides direction on how to comply with the state rule pertaining to capacity, a term used to refer to all of the capabilities that a public water system must have in order to provide safe water to its customers and remain in compliance with the drinking water regulations on a continuing basis. Intended for use by DEQ and Health District drinking water staff and by engineers, consultants, developers, and other persons involved in the development, ownership, or operation of public water systems in Idaho.

Lead and Copper Rule Short-Term Revisions and Clarifications: Draft Regulatory Guidance (U.S. EPA Web site)

Provides draft implementation guidance on the 2007 Short-Term Revisions to the Lead and Copper Rule and can help summarize and explain the requirements of the revised rule.

Point of Use: Implementation Guidance for the Use of Non-Centralized Drinking Water Treatment Devices

(DEQ Publication, October 2006: pdf 1.5 mb, 54 pages)

This guidance document is intended to provide public water systems with information necessary to make an informed decision about selecting point of use treatment and to provide systems with a description of the process involved in obtaining DEQ approval of a point of use treatment system.

Pumping Redundancy and Fire Flow Rule Interpretation

(DEQ Memorandum, October 2006: pdf 159 kb, 4 pages)

Provides clarification on drinking water rules dealing with pumping redundancy/fire flow in public water systems.

Source Water Testing Procedures (New) for Public Drinking Water Systems,

Guidance for

(DEQ Publication, December 2007: pdf 99 kb, 14 pages)

Defines adequate yield for a proposed community water system and provides
suggested aquifer testing methods, procedures and analysis necessary for predicting the long-term production capabilities of new water wells.

Standby Power Rule Interpretation

(DEQ Memorandum, August 2006: pdf 60 kb, 1 page)

Provides clarification on drinking water rules dealing with standby power.

Surface Water Treatment Rule (Interim Enhanced), Implementation Guidance for
(DEQ Publication, October 2001: pdf 162 kb, 30 pages)
Explains requirements of the rule and provides an implementation timetable. Applicable to all public water systems using surface water or ground water under the direct influence of surface water and serve at least 10,000 customers.

Surface Water Treatment Rule (Long-Term One Enhanced),

Implementation Guidance for
(DEQ Publication, May 2003, pdf 180 kb, 29 pages)
Explains requirements of the rule and provides an implementation timetable. Applicable to all public drinking water systems that use surface water or ground water under the direct influence of surface water and serve fewer than 10,000 persons.

Surface Water Treatment Rule (Long-Term Two Enhanced),

Implementation Guidance for
(DEQ Publication, November 2007, pdf 113 kb, 37 pages)
Provides a concise summary of the requirements of the Long-Term 2 Enhanced and Surface Water Treatment Rule and a compliance timetable. The primary audience is water system owners and operators who need to learn about their obligations under this rule, but it may be helpful to DEQ regulatory personnel, professional consultants, and interested customers of public drinking water systems. Applicable to all public water systems that are supplied by a surface water source and systems supplied by a ground water source under the direct influence of surface water (GWUDI).

Stage 1 Disinfectants and Disinfection By-products Rule,

Implementation Guidance for
(DEQ Publication, January 2003: pdf 197 kb, 33 pages)
Explains requirements of the rule and provides an implementation timetable. Applicable to all community and non-transient non-community public water systems that use a disinfectant for either primary or residual water treatment and to transient water systems that apply chlorine dioxide as a disinfectant.

Stage 2 Disinfectants and Disinfection By-products Rule,

Implementation Guidance for
(DEQ Publication, November 2007: pdf 101 kb, 31 pages)
Provides a concise summary of the requirements of the Stage 2 DBP Rule and a compliance timetable. The primary audience is water system owners and operators who need to learn about their obligations under this rule, but it may be helpful to regulatory personnel, professional consultants, and interested customers of public drinking water systems. Applicable to community and non-transient non-community public water systems that add a primary or residual disinfectant other than ultraviolet light, or deliver water that has been treated by a primary or residual disinfectant other than ultraviolet light.

The Idaho Drinking Water Newsletter: Special Security Issue (Issue 23)

(DEQ Publication, 2001: pdf 68 kb, 2 pages)

Offers guidelines for protecting public drinking water systems through increased security measures.

Emergency Response Plan Guide
(DEQ Publication, November 2001: pdf 1.9 mb, 6 pages)

Step-by-step guide to developing an Emergency Response Plan.

Protecting Drinking Water Sources in Idaho

(DEQ Publication, August 2000: pdf 1.1 mb, 66 pages)
Guidance on developing drinking water protection plans.

Idaho Source Water Assessment Plan

(DEQ Publication, October 1999: pdf 2.4 mb, 200 pages)

Overview of requirements and procedures for conducting source water assessments.