Code of Colorado Regulations
1000 - Department of Public Health and Environment
1002 - Water Quality Control Commission (1002 Series)
5 CCR 1002-86 - REGULATION NO. 86 - GRAYWATER CONTROL REGULATION
Section 5 CCR 1002-86.10 - Graywater Use Categories

Universal Citation: 5 CO Code Regs 1002-86 ยง 10

Current through Register Vol. 47, No. 17, September 10, 2024

General: The graywater use categories allowed are defined below. A single facility may have multiple graywater treatment works and uses as long as all applicable use and design requirements are satisfied.

Table 10-1: Graywater Use Categories and Corresponding Applications and Requirement Locations

Graywater Use Category

Use

Graywater Source(s)

End Use

Flow Projections Location

Design Criteria Location (86.12(A) applies to all graywater treatment works)

Signage Requirements for Graywater Treatment Works (86.13(A) applies to all graywater treatment works)

Control Measures for Graywater Use Categories (86.14(B) applies to all Graywater Use Categories)

A1

Single family subsurface irrigation of landscapes and edible crops

Laundry Machines

Outdoor mulch basins (single family dwelling)

86.11(A)(1)(a)

86.12(B)(1) and (2)

None required

86.14(C)

B1

Single family subsurface irrigation of landscapes and edible crops

All allowed graywater sources

Outdoor subsurface irrigation and mulch basins (single family dwelling)

86.11(A)(1)(a)

86.12(B)(1) and (3)

None required

86.14(C)

B2

Non-single family subsurface irrigation of landscapes

All allowed graywater sources

Outdoor subsurface irrigation and mulch basins (non-single family)

86.11(A)(1)(b)

86.12(B)(1) and (3)

86.13(B)(1)

86.14(C)

C1

Single family indoor toilet and urinal flushing

All allowed graywater sources

Indoor toilet and urinal flushing (single family dwelling)

86.11(A)(1)(a)

86.12(C)(1)

None required

86.14(D)

C2

Non-single family indoor toilet and urinal flushing

All allowed graywater sources

Indoor toilet and urinal flushing (non-single family)

86.11(A)(1)(b)

86.12(C)(2)

86.13(B)(2)

86.14(D)

D1

Single family rural fire protection

All allowed graywater sources

Indoor/outdoor firefighting, storage tank outdoor (single family dwelling)

86.11(A)(1)(a)

86.12(D)(1)

86.13(B)(3)

86.14(E)

D2

Non-single family rural fire protection

All allowed graywater sources

Indoor/outdoor firefighting, storage tank outdoor (non-single family)

86.11(A)(1)(b)

86.12(D)(2)

86.13(B)(3)

86.14(E)

A. Category A1: Laundry to Landscape

Category A1 graywater use must meet the following:

1. Allowed users: Single family.

2. Allowed graywater sources: Graywater collected from laundry machines.

3. Allowed uses: Outdoor, mulch basin irrigation within the confines of the legal property boundary for:
a. Landscapes, and

b. Edible crops.

4. Design flow: The design flow for a single family, Laundry to Landscape for subsurface irrigation is limited to 250 gallons per day (gpd) or less.

B. Category B1: Single family, subsurface irrigation

Category B1 graywater use must meet the following:

1. Allowed users: Single family.

2. Allowed graywater sources: Graywater collected from bathroom and laundry room sinks, bathtubs, showers, and laundry machines.

3. Allowed uses: Outdoor, subsurface irrigation within the confines of the legal property boundary for:
a. Landscapes, and

b. Edible crops.

4. Design flow: The design flow for a single family graywater treatment works is limited to a 400 gallons per day (gpd) or less combined flow for all approved uses.

C. Category B2: Non-single family, subsurface irrigation, 2,000 gallons per day (gpd) or less

Category B2 graywater use must meet the following:

1. Allowed users: Non-single family users.

2. Allowed graywater sources: Graywater collected from bathroom and laundry room sinks, bathtubs, showers, and laundry machines.

3. Allowed uses: Outdoor, subsurface irrigation within the confines of the legal property boundary for:
a. Landscapes.

4. Design flow: The design flow for a non-single family graywater treatment works is limited to 2,000 gallons per day (gpd) or less for outdoor irrigation for the entire facility.

D. Category C1: Single family, indoor toilet and urinal flushing

Category C1 graywater use must meet the following:

1. Allowed users: Single family.

2. Allowed graywater sources: Graywater collected from bathroom and laundry room sinks, bathtubs, showers, and laundry machines.

3. Allowed uses: Indoor toilet and urinal flushing and outdoor, subsurface irrigation within the confines of the legal property boundary. Treated graywater shall not be used for bidets.

4. Design flow: The design flow for a single family graywater treatment works is limited to 400 gallons per day (gpd) or less combined flow for all approved uses.

E. Category C2: Non-single family, indoor toilet and urinal flushing

Category C2 graywater use must meet the following:

1. Allowed users: Non-single family users.

2. Allowed graywater sources: Graywater collected from bathroom and laundry room sinks, bathtubs, showers, and laundry machines.

3. Allowed uses: Indoor toilet and urinal flushing and outdoor, subsurface irrigation within the confines of the legal property boundary. Treated graywater shall not be used for bidets.

4. Design flow: There is no maximum design flow for a non-single family graywater treatment works for indoor toilet and urinal flushing. The design flow is limited to 2,000 gallons per day (gpd) or less for outdoor irrigation for the entire facility.

F. Category D1: Single family rural fire protection

Category D1 graywater use must meet the following:

1. Allowed users: Single family users in areas that local rules allow homes of certain sizes to have a water storage cistern on the property for fire protection if the local fire district/authority agrees to graywater use for fire protection prior to its adoption and use in a local city, city and county or county.

2. Allowed graywater sources: Graywater collected from bathroom and laundry room sinks, bathtubs, showers, and laundry machines.

3. Allowed uses: Outdoor storage in a watertight non-potable cistern and used solely for firefighting within the confines of the legal property boundary.

4. Design flow: The design flow for a single family graywater treatment works is limited to 400 gallons per day (gpd) or less combined flow for all approved uses.

G. Category D2: Non-single family rural fire protection

Category D2 graywater use must meet the following:

1. Allowed users: Non-single family users in areas that local rules allow homes of certain sizes to have a water storage cistern on the properties for fire protection if the local fire district/authority agrees to graywater use for fire protection prior to its adoption and use in a local city, city and county or county.

2. Allowed graywater sources: Graywater collected from bathroom and laundry room sinks, bathtubs, showers, and laundry machines.

3. Allowed uses: Outdoor storage in a watertight non-potable cistern and used solely for fire fighting within the confines of the legal property boundary.

4. Design flow: There is no maximum design flow for a non-single family graywater treatment works for storing graywater in an onsite cistern for rural fire protection.

Disclaimer: These regulations may not be the most recent version. Colorado may have more current or accurate information. We make no warranties or guarantees about the accuracy, completeness, or adequacy of the information contained on this site or the information linked to on the state site. Please check official sources.
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