Summary of Wyoming's Water Reuse Guideline or Regulation for Landscaping
This page is part of the EPA’s REUSExplorer tool, which summarizes the different state level regulations or guidelines for water reuse for a variety of sources and end-uses.
The source water for this summary is Treated Municipal Wastewater.
On this page:
- Technical basis
- Water reuse for landscaping approved for use in Wyoming
- Water reuse treatment category for landscaping
- Additional context and definitions
- Water reuse for landscaping specifications (table)
- Upcoming state law or policy
- References
- Disclaimer
This page is a summary of the state’s water reuse law or policy and is provided for informational purposes only. Please always refer to the state for the most accurate and updated information.
In Wyoming, water reuse for water reuse for landscapingThe use of recycled water on land to assist in the irrigation of vegetation in residential and non-residential areas. Includes impoundments to store water for irrigation , ornamental vegetation, parks, school yards, sporting facilities (including golf courses), private gardens, roadsides and greenbelts, and cemeteries. Excludes irrigation of areas used for agriculture, commercial reuse applications, or any centralized non-potable reuse. includes irrigation of land with a high potential for public exposure, including but not limited to public parks, ball fields, cemeteries, plant nurseries, turf farms, golf courses and a reclamation site located in a populated area; irrigation of land with a moderate potential for public exposure; and irrigation of land with a low potential for public exposure, including but not limited to agricultural land, forest and a reclamation site located in an unpopulated area. The source of water treated municipal wastewater Treated wastewater effluent discharged from a centralized wastewater treatment plant of any size. Other terms referring to this source of water include domestic wastewater, treated wastewater effluent, reclaimed water, and treated sewage. is specified by the state as municipal wastewater. This write-up uses state terms when discussing sources or uses of water that may differ from the Regulations and End-Use Specifications Explorer's (REUSExplorer's) terms.
Technical basis
Wyoming approves the reuse of treated wastewater for landscaping including irrigation of land with a high, moderate and low potential for public exposure (020-0011-11 Wyo. Code R. § 11). All applicable provisions of the Clean Water Act (CWA) (33 U.S.C. §§ 1251 et seq.), including its implementing regulations, must be met. All wastewater reuse for landscape irrigation are regulated by the state and require a Chapter 3 permit from the Wyoming Department of Environmental Quality. Treatment requirements and performance standards are applied for the removal of microbial contaminants, chemicals and other relevant indicators related to agriculture and are summarized in the table. The technical basis for developing the specifications and/or removals of microbial contaminants, chemicals and other relevant indicators is not explicitly specified.
Water reuse for landscaping approved for use in Wyoming
020-0011-11 Wyo. Code R. § 11 defines the following approved water reuse for landscaping:
- Irrigation of land with a high potential for public exposure, including but not limited to public parks, ball fields, cemeteries, plant nurseries, turf farms, golf courses and a reclamation site located in a populated area (e.g., a construction site located in a city) (Class A)
- Irrigation of land with a moderate potential for public exposure (specific examples not provided) (Class B)
- Irrigation of land with a low potential for public exposure, including but not limited to agricultural land, forest and a reclamation site located in an unpopulated area (e.g., a strip mine located in a rural area) (Class C)
Water reuse treatment category for landscaping
The various classes of reclaimed water treatment are defined by their respective treatment requirements and applicable performance standards. The respective treatment requirements are briefly summarized for water reuse for landscaping (020-0011-11 Wyo. Code R. § 11):
- For Class A wastewater, advanced and/or secondary treatment and a level of disinfection to meet the fecal coliform level of 2.2 organisms/100 mL or less are required.
- For Class B wastewater, secondary treatment and a level of disinfection to meet the fecal coliform level of greater than 2.2 organisms/100 mL but less than 200 organisms/100 mL are required.
- For Class C wastewater, primary treatment and a level of disinfection to meet the fecal coliform level of 200 organisms/100 mL or greater but less than 1,000 organisms/100 mL are required.
Additional context and definitions
In Wyoming, municipal wastewater is defined as “the discharge from a publicly owned or controlled treatment system receiving primarily domestic wastewater or a combination of domestic, commercial and industrial wastewater that is normally treated in a primary, secondary or advanced wastewater treatment process” (020-0011-11 Wyo. Code R. § 11). Wyoming defines treated wastewater as domestic sewage discharged from a treatment works after completion of the treatment process (020-0011-11 Wyo. Code R. § 11).
Wyoming provides definitions for high, moderate and low potential for public exposure (020-0011-11 Wyo. Code R. § 11). These definitions are provided:
- "Land with a high potential for public exposure" is land that the public uses frequently and there are no restrictions or limitations on public access during irrigation periods. This includes, but is not limited to public parks, ball fields, cemeteries, plant nurseries, turf farms, golf courses and a reclamation site located in a populated area (e.g., a construction site located in a city).
- “Land with moderate potential for public exposure" is land that is accessible to the public, but access is limited during irrigation periods. This would include the facilities in where signing and fencing is provided to restrict access.
- "Land with a low potential for public exposure" is land that the public uses infrequently. This includes, but is not limited to agricultural land, forest and a reclamation site located in an unpopulated area (e.g., a strip mine located in a rural area).
If Class A or Class B wastewater is reused for irrigation, a 30-foot buffer zone is required between the reuse site and adjacent property lines (020-0011-11 Wyo. Code R. § 11). Fencing and signing shall be provided at sites where Class B treated wastewater is proposed for reuse on land with a moderate potential for public exposure (020-0011-11 Wyo. Code R. § 11). Signing shall be provided at sites where Class B or Class C treated wastewater is proposed for reuse on land with a low potential for public exposure in order to protect the health and safety of workers (020-0011-11 Wyo. Code R. § 11).
Water reuse for landscaping specifications
Summary of Wyoming's Water Reuse for Landscaping Specifications
| Recycled Water Class/Category | Source Water Type | Water Quality Parametera | Specification | Sampling/Monitoring Requirements (Frequency of monitoring; site/ location of sample; quantification methods)* |
|---|---|---|---|---|
|
Class A (Irrigation of land with high potential for public exposure) |
Treated wastewater |
pH |
Not specified |
Representative samples shall be analyzed in accordance with 40 CFR Part 136, Guidelines Establishing Test Procedures for the Analysis of Pollutants. For mechanical plants, monitoring once per week or the monitoring frequency specified in the NPDES discharge permit whichever is more frequent. For lagoon systems, monitoring one per month or the frequency specified in the NPDES discharge permit whichever is more frequent. |
|
Fecal coliforms |
2.2 organisms/100 mL or less |
|||
|
Nitrate (as N) |
Not specified |
|||
|
Ammonia (as N) |
Not specified |
|||
|
Phosphorus |
Not specified |
|||
|
Class B (Irrigation of land with moderate potential for public exposure) |
Treated wastewater |
pH |
Not specified |
Representative samples shall be analyzed in accordance with 40 CFR Part 136, Guidelines Establishing Test Procedures for the Analysis of Pollutants. For mechanical plants, monitoring once per week or the monitoring frequency specified in the NPDES discharge permit whichever is more frequent. For lagoon systems, monitoring one per month or the frequency specified in the NPDES discharge permit whichever is more frequent. |
|
Fecal coliforms |
≥ 2.2 organisms/100 mL but ≤ 200 organisms/100 mL |
|||
|
Nitrate (as N) |
Not specified |
|||
|
Ammonia (as N) |
Not specified |
|||
|
Phosphorus |
Not specified |
|||
|
Class C (Irrigation of land with low potential for public exposure) |
Treated wastewater |
Fecal coliform |
200 organisms/100 mL or ≥1,000 organisms/100 mL |
Representative samples shall be analyzed in accordance with 40 CFR Part 136, Guidelines Establishing Test Procedures for the Analysis of Pollutants. For mechanical plants, monitoring once per week or the monitoring frequency specified in the NPDES discharge permit whichever is more frequent. For lagoon systems, monitoring one per month or the frequency specified in the NPDES discharge permit whichever is more frequent. |
|
Nitrate (as N) |
Not specified |
|||
|
Ammonia (as N) |
Not specified |
|||
|
pH |
Not specified |
|||
|
Phosphorus |
Not specified |
Source= 020-0011-11 Wyo. Code R. § 11(H)
* Information about sampling and monitoring requirements such as frequency, site and quantification methods not specifically listed in the table was not explicitly specified in the State-specific regulations.
a Wyoming provides separate numerical water quality criteria for special situations, including continuous and unrestricted irrigation of parks, playgrounds, highway rest areas and rights-of-way (R.O.W.s), or domestic, commercial and industrial grounds with treated municipal wastewater effluent (020-0011-11 Wyo. Code R. § 11(E), Section 55. It is not specified which classes these criteria apply to (e.g., Class A, Class B, Class C).
Upcoming state law or policy
No upcoming regulations pertaining to water reuse for landscaping were found for Wyoming.
References
Clean Water Act, 33 U.S.C. §§ 1251 et seq.
Design and Construction Standards for Sewerage System, Treatment Works, Disposal Systems, or Other Facilities Capable of Causing or Contributing to Pollution and Mobile Home Park and Campground Sewerage and Public Water Supply Distribution Systems, 020-0011-11 Wyo. Code R. § 11
Part E - Standards for the Application of Biosolids and the Reuse of Treated Non-Domestic Wastewater, 020-0011-11 Wyo. Code R. § 11(E).
Part H – Standards for the Reuse of Treated Domestic Wastewater, 020-0011-11 Wyo. Code R. § 11(H).
Please contact us at waterreuse@epa.gov if the information on this page needs updating or if this state is updating or planning to update its laws and policies and we have not included that information on the news page.