State-By-State Guide to Dispenser Filter Regulations

Regulations for dispenser filtration vary widely by state. Some states mandate a specific micron rating for dispenser filters, some simply require a dispenser filter, while others do not specify dispenser filtration in their regulations at all. To help clarify the expectations, PetroClear reached out to state agencies about their dispenser filter requirements and compiled a State-By-State Guide to Dispenser Filtration Regulations. Click your state on the map to learn about your state’s dispenser filter requirements.

Also, be sure to read our blog post, “Dispenser Filtration Regulations In My State – 6 Frequently Asked Questions,” which clarifies some of the confusing aspects of filtration requirements.

Note: To share comments or questions about PetroClear’s dispenser filtration micron requirement information, please email PetroClear Business Director Robert Ingham at robert.ingham@champlabs.com.

Alabama
Rule: Alabama adopts the latest NIST Handbook 130 on an annual basis. The 2022 edition of NIST Handbook 130 states:
4.3. Dispenser Filters.
4.3.1. Engine Fuel Dispensers.
(a) All gasoline, gasoline-alcohol blends, gasoline-ether blends, ethanol flex fuel, and M85 methanol dispensers shall have a 10 micron or smaller nominal pore-sized filter.
(b) All biodiesel, biodiesel blends, diesel, and kerosene dispensers shall have a 30 micron or smaller nominal pore-sized filter.
(Amended 2014)
For Reference: 2022 Version of NIST Handbook 130
For More Information: Contact the Alabama Department of Agriculture & Industries, Weights & Measures

Alaska
Rule: Although Alaska has adopted portions of NIST Handbook 130, the state does not have a requirement for dispenser filtration.
For Reference: 2020 Version of NIST Handbook 130
For More Information: Contact the Alaska Department of Transportation & Public Facilities, Measurement Standards & Commercial Vehicle Compliance

Arizona
Rule: Follows Arizona Administrative Code Supplement 18-3; R3-7-717 C Motor Fuel Dispensing Site Equipment:
Motor fuel dispenser filters. An owner or operator of a motor fuel dispensing site shall ensure that:

1. All gasoline, gasoline-alcohol blends, and ethanol flex fuel dispensers have a 10 micron or smaller nominal pore-sized filter;
2. Dispensers that dispense gasoline-alcohol blends shall have fuel filters designed for use with gasoline-alcohol blends;
3. All biodiesel, biodiesel blends, diesel, and kerosene dispensers have a 30 micron or smaller nominal pore-sized filter; or
4. In the event a fuel dispenser is not manufactured to be equipped to use fuel filters, they shall be installed in line with the fuel dispensing hose at the base of the dispenser. If this is not feasible, the motor fuel dispensing site owner may provide evidence that fuel filters cannot be installed at the site due to the configuration and apply for a waiver from these requirements from the Associate Director.

For Reference: Arizona Administrative Code
For More Information: Arizona Department of Agriculture Weights and Measures Services Division

Arkansas
Rule: The Petroleum Quality Division of the Arkansas Agriculture Department is responsible for administering and enforcing NIST Handbook 130 Uniform Engine Fuels and Automotive Lubricants Regulations, including the Annotated Code. According to the Department’s Laws and Regulations webpage, Arkansas adopts NIST Handbook 130, as amended from time to time by the National Conference on Weights and Measures:
4.3. Dispenser Filters.
4.3.1. Engine Fuel Dispensers.
(a) All gasoline, gasoline-alcohol blends, gasoline-ether blends, ethanol flex fuel, and M85 methanol dispensers shall have a 10 micron or smaller nominal pore-sized filter.
(b) All biodiesel, biodiesel blends, diesel, and kerosene dispensers shall have a 30 micron or smaller nominal pore-sized filter.
(Amended 2014)
For Reference: 2022 Version of NIST Handbook 130
For More Information: Arkansas Agriculture Department

California
Rule: None.
For More Information: California Department of Food and Agriculture, Division of Measurement Standards

Colorado
Rule: Follows 2018 version of NIST Handbook 130:
4.3. Dispenser Filters.
4.3.1. Engine Fuel Dispensers.
(a) All gasoline, gasoline-alcohol blends, gasoline-ether blends, ethanol flex fuel, and M85 methanol dispensers shall have a 10 micron or smaller nominal pore-sized filter.
(b) All biodiesel, biodiesel blends, diesel, and kerosene dispensers shall have a 30 micron or smaller nominal pore-sized filter. (Amended 2014)
For Reference: 2018 Version of NIST Handbook 130
For More Information: Colorado Department of Agriculture, Measurement Standards

Connecticut
Rule: None. However, there are two requirements that generally compel the use of filters. Connecticut adopts ASTM standards pursuant to regulations under 14-327d CGS, and NTEP requirements pursuant to regulations under 43-3 CGS. Connecticut adopts by reference ASTM D4814 for gasoline and D975 for diesel. Workmanship requirements in the spec call for the finished fuel to be free of adulterants and sediment. Additionally, there are requirements for meeting the National Type Evaluation Program (NTEP) certificate of conformance. Filters are added as a protection for the meter by the manufacturer. They are approved as built pursuant to NTEP. If the unit was approved with a filter, and the manufacturer was issued a certificate of conformance by an NTEP lab, then a dispenser filter needs to be included and maintained to meet the demands of the certificate and to operate the meter as required by the manufacturer.
For More Information: Connecticut State Department of Consumer Protection, The Standards Program – Weights and Measures

Delaware
Rule: Follows NIST Handbook 130. The 2020 edition of NIST Handbook 130 states:
4.3. Dispenser Filters.
4.3.1. Engine Fuel Dispensers.
(a) All gasoline, gasoline-alcohol blends, gasoline-ether blends, ethanol flex fuel, and M85 methanol dispensers shall have a 10 micron or smaller nominal pore-sized filter.
(b) All biodiesel, biodiesel blends, diesel, and kerosene dispensers shall have a 30 micron or smaller nominal pore-sized filter.
(Amended 2014)
For Reference: 2020 Version of NIST Handbook 130
For More Information: Delaware Department of Agriculture, Weights & Measures

Florida
Rule: None.
For More Information: Florida Department of Agriculture and Consumer Services, Weights and Measures

Georgia
Rule: Follows Georgia Department of Agriculture Rule 40-20-1-.10:
40-20-1-.10 Water in Retail Tanks; Dispenser Filters.
(a) It shall be a violation for water and or water phase to be detected, when measured from the bottom through the fill pipe, supply line or detection system of any tank utilized in the storage of oxygenated fuels, aviation gasoline and aviation fuel sold at retail. A stop sale shall be issued when water or water phase exceeds one fourth (1/4) of an inch. It shall be a violation for water to exceed one inch in depth, when measured from the bottom through the fill pipe, supply line or detection system of any tank utilized in the storage of the other regulated products sold at retail. A stop sale shall be issued when water exceeds two inches. For violations the water must be removed from the tank prior to the delivery and subsequent selling of additional product from such storage tank. For stop sales the removal must be done prior to resumption of sales.
(b) Prior to the sale of oxygenated fuels, the storage tanks must be clean and free of water and sedimentation (particulate material). Subsequently, the system must be monitored and kept free of any accumulation of water, water phase and sedimentation.
(c) Retail dispensing equipment shall use a 10 micron or less fuel filter for all products. It is recommended that water sensitive filters or phase separation filters, compatible with the product being dispensed, be used.*

*The Weights & Measures Laboratory indicated that a 30-micron nominal dispenser filter may be allowed for high-speed diesel or biodiesel blends.
For Reference: 40-20-1-.10 Water in Retail Tanks; Dispenser Filters
For More Information: Georgia Department of Agriculture, Weights & Measures Laboratory

Hawaii
Rule: None.
For More Information: State of Hawaii, Quality Assurance Division, Measurement Standards Branch

Idaho
Rule: None.
For More Information: Idaho State Department of Agriculture, Weights And Measures

Illinois
Rule: None.
For More Information: Illinois Department of Agriculture, Weights & Measures

Indiana
Rule: Follows the 2014 version of NIST Handbook 130:
4.3. Dispenser Filters.
4.3.1. Engine Fuel Dispensers.
(a) All gasoline, gasoline-alcohol blends, gasoline-ether blends, E85 fuel ethanol and M85 methanol dispensers shall have a 10 micron or smaller nominal pore-sized filter.
(b) All biodiesel, biodiesel blends, diesel, and kerosene dispensers shall have a 30 micron or smaller nominal pore-sized filter.
For Reference: 2014 Version of NIST Handbook 130
For More Information: Indiana State Department of Health, Division of Weights, Measures and Metrology

Iowa
Rule: Follows the 2020 version of NIST Handbook 130:
4.3. Dispenser Filters.
4.3.1. Engine Fuel Dispensers.
(a) All gasoline, gasoline-alcohol blends, gasoline-ether blends, E85 fuel ethanol and M85 methanol dispensers shall have a 10 micron or smaller nominal pore-sized filter.
(b) All biodiesel, biodiesel blends, diesel, and kerosene dispensers shall have a 30 micron or smaller nominal pore-sized filter.

(Amended 2014)

For Reference: 2020 Version of NIST Handbook 130
For More Information: Iowa Department of Agriculture And Land Stewardship, Weights and Measures Bureau

Kansas
Rule: Follows 2012 version of NIST Handbook 130:
4.3. Dispenser Filters.
4.3.1. Engine Fuel Dispensers.
(a) All gasoline, gasoline-alcohol blends, gasoline-ether blends, E85 fuel ethanol and M85 methanol dispensers shall have a 10 micron or smaller nominal pore-sized filter.
(b) All biodiesel, biodiesel blends, diesel, and kerosene dispensers shall have a 30 micron or smaller nominal pore-sized filter.
For Reference: 2012 Version of NIST Handbook 130
For More Information: Kansas Department of Agriculture, Weights and Measures

Kentucky
Rule: None.
For More Information: Kentucky Department of Agriculture, Weights and Measures

Louisiana
Rule: None.
For More Information: State of Louisiana, Department of Agriculture and Forestry

Maine
Rule: Adopts the latest NIST Handbook 130 on an annual basis. The 2022 edition of NIST Handbook 130 states:
4.3.1. Engine Fuel Dispensers.
(a) All gasoline, gasoline-alcohol blends, gasoline-ether blends, ethanol flex fuel, and M85 methanol dispensers shall have a 10 micron or smaller nominal pore-sized filter.
(b) All biodiesel, biodiesel blends, diesel, and kerosene dispensers shall have a 30 micron or smaller nominal pore-sized filter.
(Amended 2014)
For Reference: 2022 Version of NIST Handbook 130
For More Information: Department of Agriculture, Conservation and Forestry, Quality Assurance & Regulations – Metrology

Maryland
Rule: None.
For More Information: Comptroller of Maryland Motor Fuel Inspection Program

Massachusetts
Rule: Adopts the latest NIST Handbook 130 on an annual basis. The 2022 edition of NIST Handbook 130 states:
4.3. Dispenser Filters.
4.3.1. Engine Fuel Dispensers.
(a) All gasoline, gasoline-alcohol blends, gasoline-ether blends, ethanol flex fuel, and M85 methanol dispensers shall have a 10 micron or smaller nominal pore-sized filter.
(b) All biodiesel, biodiesel blends, diesel, and kerosene dispensers shall have a 30 micron or smaller nominal pore-sized filter.
(Amended 2014)
For Reference: 2022 Version of NIST Handbook 130
For More Information: Massachusetts Division of Standards

Michigan
Rule: Department of Agriculture Laboratory Division Regulation No. 564 — Automotive Motor Fuel Purity, Additives, and Grading (R 285.564.14):
A Retailer offering an ethanol blended product at retail shall do all of the following:
(a) Remove all water and precipitated materials from the storage tank before the initial gasoline-alcohol blend is delivered into the tank.
(b) Install a suitable filter, 10 microns or less, in the meter inlet or discharge line and immediately adjacent to the meter.
(c) Record the water level of blended product storage tanks daily and make these records available to the department upon request.
(d) On a regular basis and upon receipt of a quality complaint examine the blended product to ensure that the product dispensed remains clear and bright and free of visible water or haze.
For Reference: R 285.564.14 – Retailer requirements.
For More Information: Department of Agriculture & Rural Development

Minnesota
Rule: None.
For More Information: Minnesota Commerce Department, Weights and Measures

Mississippi
Rule: Adopts the latest NIST Handbook 130 on an annual basis. The 2022 edition of NIST Handbook 130 states:
4.3. Dispenser Filters.
4.3.1. Engine Fuel Dispensers.
(a) All gasoline, gasoline-alcohol blends, gasoline-ether blends, ethanol flex fuel, and M85 methanol dispensers shall have a 10 micron or smaller nominal pore-sized filter.
(b) All biodiesel, biodiesel blends, diesel, and kerosene dispensers shall have a 30 micron or smaller nominal pore-sized filter.
(Amended 2014)
For Reference: 2022 Version of NIST Handbook 130
For More Information: Mississippi Department of Agriculture & Commerce, Weights and Measures Division

Missouri
Rule: 2 CSR 90-30.040 3-B Quality Standards for Motor Fuels (standard does not apply to diesel):
A suitable filter, ten (10) microns or less, must be installed in the meter inlet or discharge line and immediately adjacent to the meter.
For Reference: Rules of Department of Agriculture, Division 90, Chapter 30
For More Information: Missouri Department of Agriculture – Weights and Measures

Montana
Rule: Follows 2012 version of NIST Handbook 130:
4.3. Dispenser Filters.
4.3.1. Engine Fuel Dispensers.
(a) All gasoline, gasoline-alcohol blends, gasoline-ether blends, E85 fuel ethanol and M85 methanol dispensers shall have a 10 micron or smaller nominal pore-sized filter.
(b) All biodiesel, biodiesel blends, diesel, and kerosene dispensers shall have a 30 micron or smaller nominal pore-sized filter
For Reference: 2012 Version of NIST Handbook 130
For More Information: Montana Department of Labor & Industry

Nebraska
Rule: None.
For More Information: Nebraska Department of Agriculture’s Weights and Measures program

Nevada
Rule: Adopts the latest NIST Handbook 130 on an annual basis. The 2022 edition of NIST Handbook 130 states:
4.3. Dispenser Filters.
4.3.1. Engine Fuel Dispensers.
(a) All gasoline, gasoline-alcohol blends, gasoline-ether blends, ethanol flex fuel, and M85 methanol dispensers shall have a 10 micron or smaller nominal pore-sized filter.
(b) All biodiesel, biodiesel blends, diesel, and kerosene dispensers shall have a 30 micron or smaller nominal pore-sized filter.
(Amended 2014)
For Reference: 2022 Version of NIST Handbook 130
For More Information: State of Nevada’s Department of Agriculture, Consumer Equitability – Petroleum Technology Program

New Hampshire
Rule: Follows the guidelines presented in the latest NIST Handbook 130, however reports of compliance issues are addressed on a case-by-case basis. The 2022 edition of NIST Handbook 130 states:
4.3. Dispenser Filters.
4.3.1. Engine Fuel Dispensers.
(a) All gasoline, gasoline-alcohol blends, gasoline-ether blends, ethanol flex fuel, and M85 methanol dispensers shall have a 10 micron or smaller nominal pore-sized filter.
(b) All biodiesel, biodiesel blends, diesel, and kerosene dispensers shall have a 30 micron or smaller nominal pore-sized filter.
(Amended 2014)
For Reference: 2022 Version of NIST Handbook 130
For More Information: New Hampshire Department of Agriculture, Markets and Food – Division of Weights and Measures

New Jersey
Rule: Adopts the latest NIST Handbook 130 on an annual basis. The 2022 edition of NIST Handbook 130 states:
4.3. Dispenser Filters.
4.3.1. Engine Fuel Dispensers.
(a) All gasoline, gasoline-alcohol blends, gasoline-ether blends, ethanol flex fuel, and M85 methanol dispensers shall have a 10 micron or smaller nominal pore-sized filter.
(b) All biodiesel, biodiesel blends, diesel, and kerosene dispensers shall have a 30 micron or smaller nominal pore-sized filter.
(Amended 2014)
For Reference: 2022 Version of NIST Handbook 130
For More Information: New Jersey Division of Consumer Affairs, Office of Weights and Measures

New Mexico
Rule: None.
For More Information: New Mexico Department of Agriculture, Weights and Measures Licensing and Registration

New York
Rule: None.
For More Information: New York State, Agriculture and Markets – Bureau of Weights and Measures Programs

North Carolina
Rule: North Carolina does not currently have a dispenser filter requirement in place. However, the state is reviewing dispenser filtration requirements and is considering adopting standards from NIST Handbook 130.
For Reference: 2020 Version of NIST Handbook 130
For More Information: North Carolina Department of Agriculture & Consumer Services, Standards Division

North Dakota
Rule: None.
For More Information: North Dakota Weights and Measures

Ohio
Rule: None.
For More Information: Ohio Department of Agriculture, Weights & Measures

Oklahoma
Rule: TITLE 165. CORPORATION COMMISSION CHAPTER 15. FUEL INSPECTION EFFECTIVE October 1, 2020; 165:15-15-40.1.
Dispenser Filters
(a) All gasoline, gasoline-alcohol blends, gasoline-ether blends, E85 fuel ethanol and M85 methanol dispensers located at retail facilities shall have a 10 micron or smaller pore-sized filter. (b) All biodiesel, biodiesel blends, diesel, and kerosene dispensers located at retail facilities shall have a 30 micron or smaller sized filter.
[Source: Amended at 18 Ok Reg 1052, eff 5-11-01]
For Reference:
165:15-15-40.1. Dispenser Filters
For More Information: Oklahoma Agriculture Food and Forestry, Consumer Protection

Oregon
Rule: Oregon does not specify a dispenser filtration requirement, but requires that fuel sold meet mandatory quality specifications. Fuel sites need to determine what level of filtration is necessary to ensure the fuel is adequately free of particulate.
For More Information: Oregon Department of Agriculture Metrology Laboratory

Pennsylvania
Rule: The Pennsylvania Department of Agriculture’s Division of Weights and Measures adopts NIST Handbook 130 by statute. The 2022 edition of the handbook requires the following filter sizes:
4.3. Dispenser Filters.
4.3.1. Engine Fuel Dispensers.
(a) All gasoline, gasoline-alcohol blends, gasoline-ether blends, ethanol flex fuel, and M85 methanol dispensers shall have a 10 micron or smaller nominal pore-sized filter.
(b) All biodiesel, biodiesel blends, diesel, and kerosene dispensers shall have a 30 micron or smaller nominal pore-sized filter.
(Amended 2014)
For Reference: 2022 Version of NIST Handbook 130
 For More Information: Pennsylvania Department of Agriculture, Weights and Measures

Rhode Island
Rule: None.
For More Information: Rhode Island Department of Environmental Management

South Carolina
Rule: None.
For More Information: South Carolina Department of Agriculture – Metrology

South Dakota
Rule: South Dakota has adopted the 2020 edition of NIST Handbook 130. The 2020 edition of the handbook requires the following filters:
4.3. Dispenser Filters.
4.3.1. Engine Fuel Dispensers.
(a) All gasoline, gasoline-alcohol blends, gasoline-ether blends, ethanol flex fuel, and M85 methanol dispensers shall have a 10 micron or smaller nominal pore-sized filter.
(b) All biodiesel, biodiesel blends, diesel, and kerosene dispensers shall have a 30 micron or smaller nominal pore-sized filter.
(Amended 2014)
For Reference: 2020 Version of NIST Handbook 130
For More Information: South Dakota Department of Public Safety

Tennessee
Rule: 0080-05-12-.04 3 (a) & (b) WATER IN RETAIL TANKS AND DISPENSER FILTERS.
(3) Dispenser Filters
(a) All gasoline, gasoline-oxygenate blends, Ethanol Flex Fuel, and M85 methanol dispensers shall have a 10 micron or smaller nominal pore-sized filter. All dispensers must be compliant with this requirement by July 1, 2015.
(b) All kerosene, diesel, biodiesel, and biodiesel blend dispensers shall have a 30 micron or smaller nominal pore-sized filter. All dispensers must be compliant with this requirement by July 1, 2015.
For Reference: Rules of Tennessee Department of Agriculture Division of Markets Chapter 0080-05-12 Kerosene and Motor Fuels Quality Inspection Regulations
For More Information: Tennessee Weights & Measures Metrology Lab

Texas
Rule: Oversight of the state’s Motor Fuels program has transferred from the Texas Department of Agriculture (TDA) to the Texas Department of Licensing and Regulation (TDLR). The TDLR Motor Fuel Metering and Quality Law webpage states that NIST Handbook 130 standards are adopted by reference. The 2020 edition of the handbook requires the following filter sizes:
4.3. Dispenser Filters.
4.3.1. Engine Fuel Dispensers.
(a) All gasoline, gasoline-alcohol blends, gasoline-ether blends, ethanol flex fuel, and M85 methanol dispensers shall have a 10 micron or smaller nominal pore-sized filter.
(b) All biodiesel, biodiesel blends, diesel, and kerosene dispensers shall have a 30 micron or smaller nominal pore-sized filter.
(Amended 2014)
For Reference: 2020 Version of NIST Handbook 130
For More Information: Texas Department of Licensing and Regulation Motor Fuel Metering and Quality

Utah
Rule: Follows the 2017 version of NIST Handbook 130:
4.3. Dispenser Filters.
4.3.1. Engine Fuel Dispensers.
(a) All gasoline, gasoline-alcohol blends, gasoline-ether blends, ethanol flex fuel, and M85 methanol dispensers shall have a 10 micron or smaller nominal pore-sized filter.
(b) All biodiesel, biodiesel blends, diesel, and kerosene dispensers shall have a 30 micron or smaller nominal pore-sized filter.
(Amended 2014)
For Reference:
2017 Version of NIST Handbook 130
For More Information: Utah Department of Agriculture and Food, Weights & Measures

Vermont
Rule: Vermont adopts parts of NIST Handbook 130, but that is not inclusive of the Uniform Engine Fuels & Automotive Lubricants Regulation. However, if the agency receives consumer complaints, NIST Handbook 130 regulations would be referenced as a guideline. Therefore, Vermont recommends that operators follow NIST Handbook 130. The 2022 edition of the handbook requires the following filter sizes:
4.3. Dispenser Filters.
4.3.1. Engine Fuel Dispensers.
(a) All gasoline, gasoline-alcohol blends, gasoline-ether blends, ethanol flex fuel, and M85 methanol dispensers shall have a 10 micron or smaller nominal pore-sized filter.
(b) All biodiesel, biodiesel blends, diesel, and kerosene dispensers shall have a 30 micron or smaller nominal pore-sized filter.
(Amended 2014)
For Reference: 2022 Version of NIST Handbook 130
For More Information: Vermont Agency of Agriculture, Food & Markets

Virginia
Rule: Adopts the latest NIST Handbook 130 on an annual basis. The 2022 edition of NIST Handbook 130 states:
4.3. Dispenser Filters.
4.3.1. Engine Fuel Dispensers.
(a) All gasoline, gasoline-alcohol blends, gasoline-ether blends, ethanol flex fuel, and M85 methanol dispensers shall have a 10 micron or smaller nominal pore-sized filter.
(b) All biodiesel, biodiesel blends, diesel, and kerosene dispensers shall have a 30 micron or smaller nominal pore-sized filter.
(Amended 2014)
For Reference:  2022 Version of NIST Handbook 130
For More Information: Virginia Department of Agriculture and Consumer Services, Weights & Measures Services

Washington
Rule: Follows the 2016 version of NIST Handbook 130:
4.3. Dispenser Filters.
4.3.1. Engine Fuel Dispensers.
(a) All gasoline, gasoline-alcohol blends, gasoline-ether blends, ethanol flex fuel, and M85 methanol dispensers shall have a 10 micron or smaller nominal pore-sized filter.
(b) All biodiesel, biodiesel blends, diesel, and kerosene dispensers shall have a 30 micron or smaller nominal pore-sized filter.
(Amended 2014)
For Reference: 2016 Version of NIST Handbook 130
For More Information: Washington State Department of Agriculture, Weights & Measures Program

West Virginia
Rule: Adopts the latest NIST Handbook 130 on an annual basis. The 2022 edition of NIST Handbook 130 states:
4.3. Dispenser Filters.
4.3.1. Engine Fuel Dispensers.
(a) All gasoline, gasoline-alcohol blends, gasoline-ether blends, ethanol flex fuel, and M85 methanol dispensers shall have a 10 micron or smaller nominal pore-sized filter.
(b) All biodiesel, biodiesel blends, diesel, and kerosene dispensers shall have a 30 micron or smaller nominal pore-sized filter.
(Amended 2014)
For Reference: 2022 Version of NIST Handbook 130

For More Information: West Virginia Division of Labor, Weights & Measures

Wisconsin
Rule: The Wisconsin Administrative Code includes two dispenser filtration requirements: Regarding equipment requirements for ethanol blends ATCP 93.680(3)(c)(3) states that a 1- or 2-micron in-line filter shall be used for dispensing ethanol-based alternative fuel.
Regarding equipment requirements for biodiesel blends, ATCP 93.680(6)(c)(3) states that a 2- or 10-micron inline filter shall be used for dispensing fuel consisting of more than 5% percent biodiesel by volume.
For Reference: Chapter ATCP 93 — Flammable, Combustible, and Hazardous Liquids
For More Information: State of Wisconsin Department of Agriculture Trade and Consumer Protection

Wyoming
Rule: None.
For More Information: Wyoming Department of Agriculture, Technical Services Division