Statutes, codes, and regulations
Colorado Administrative Code
Department 1000 - Department of AgricultureDivision 1003 - Water And Wastewater Facility Operators Certification Board (1003 Series)
Rule 5 CCR 1003-2 - REGULATION NO. 100 - WATER AND WASTEWATER FACILITY OPERATORS CERTIFICATION REQUIREMENTS
Section 5 CCR 1003-2-100.4 - WATER TREATMENT FACILITY CLASSIFICATION

5 Colo. Code Regs. § 1003-2-100.4

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Current through Register Vol. 47, No. 11, June 10, 2024
Section 5 CCR 1003-2-100.4 - WATER TREATMENT FACILITY CLASSIFICATION
100.4.1 Water treatment facilities shall be classified in accordance with the following four classes; Class D, Class C, Class B, or Class A. Class A is the highest level of classification and Class D is the lowest level of classification. The Division may make changes in classification in accordance with the needs created by particular complexities of any specific water treatment facility based on consideration of facility specific factors, including, but not limited to:
(a) special features of design;
(b) source of supply which make operation more difficult than normal; or
(c) a combination of such conditions.
100.4.2 Table - Criteria for Water Treatment Facility Classes A, B, C, and D

Plant Design Flow Rate

(in GPM)

Treatment Type1

Less than 350

350 to 1400

More than 1400

Filtration

Granular media filtration with coagulants or polymers (direct or conventional)

B

A

A

Engineered biologically active filtration (conventional)

B

A

A

Slow sand or diatomaceous earth

C

C

B

Membrane filtration (microfiltration, ultrafiltration)

C

B

A

Membrane filtration (nanofiltration or reverse osmosis)

C

B

A

Cation or anion exchange technology

C

C

B

Greensand media or other adsorptive media (backwash, regeneration)

C

C

B

Granular media filtration with pre-chlorine feed (typically iron removal in groundwater)

D

C

C

Bag or cartridge filtration

(compliance with the surface water treatment rules) For non-Surface Water Treatment Rule (SWTR) use, see Sediment Pre-filtration.

C

C

B

Granular activated carbon

C

C

B

Sediment pre-filtration

D

C

C

Disinfection

Ozone

B

A

A

Chlorine dioxide - formed onsite

B

A

A

Chlorine dioxide - pre-formed and fed onsite

C

C

B

Monochloramine (chlorine and ammonia)

C

B

A

Onsite hypochlorite generation

C

C

B

Gas chlorine

C

B

A

Ultraviolet Light

D

C

C

Calcium hypochlorite

D

D

C

Sodium hypochlorite

D

D

C

Hand-pumped wells regulated under Colorado Primary Drinking Water Regulations, 5 CCR 1002-11

Alternatively can be operated by Level 1 or above Distribution operator without a treatment operator.

D

Public water systems with a disinfection waiver and no other treatment installed at sources.

Covered under Section 100.8

Booster chlorination within the distribution system

Covered under Section 100.8

Other treatment

Hydrogen peroxide

B

B

A

Coagulant addition (apart from conventional/direct filtration)

B

B

A

Fluoridation

C

B

B

Adjusting pH and/or alkalinity (e.g. caustic, soda ash, lime, calcite contactor, acid feed, C02 feed)

C

C

B

Corrosion inhibitors (e.g. orthophosphate based or silicates)

C

C

B

Permanganate

C

C

B

Powder activated carbon

C

C

B

Source water blending to comply with Colorado Primary Drinking Water Regulations, 5 CCR 1002-11 (Nitrates, radionuclides, other inorganics)

C

C

B

Source water blending for aesthetic or non-regulatory reasons

D

C

C

Iron or manganese sequestering agents (polyphosphate)

D

C

C

Aeration (aeration towers)

D

C

C

Storage tank treatment systems (for contaminant removal)

D

D

C

Note: 1. The treatment processes are listed as examples and are not all inclusive but are representative and the division will categorize other technologies consistent with this list and classify facilities based on the similar technologies. Also, treatment categories have been inserted in order for the table to be simpler to navigate.

100.4.3 The classification of any water treatment facility may be changed at the discretion of the Division based on changes in any condition or circumstance since the last classification determination.
100.4.4 Any drinking watertreatment facility that utilizes a combination of two or more of the treatment processes described in section 100.4.2 shall be classified in accordance with the highest level of treatment process utilized.
100.4.5 Water treatment facilities that meet the exemption criteria in section 100.1.5(a) are exempt from the requirement to operate under the supervision of a certified operator in responsible charge and shall not be classified.

5 CCR 1003-2-100.4

37 CR 18, September 25, 2014, effective 10/30/2014
38 CR 14, July 25, 2015, effective 8/30/2015
39 CR 01, January 10, 2016, effective 1/30/2016
39 CR 24, December 25, 2016, effective 1/30/2017
40 CR 14, July 25, 2017, effective 8/31/2017
41 CR 20, October 25, 2018, effective 3/1/2019
41 CR 24, December 25, 2018, effective 3/1/2019
42 CR 24, December 25, 2019, effective 1/14/2020
43 CR 21, November 10, 2020, effective 11/30/2020
44 CR 05, March 10, 2021, effective 3/31/2021
44 CR 09, May 10, 2021, effective 5/30/2021
44 CR 20, October 25, 2021, effective 11/30/2021