Shown verbatim: the complete text as captured from the official PDF posted by the Oklahoma Legislature, fetched 2026-07-23. Page and line markers are part of the official record; nothing is edited or removed. The official bill page.
1 STATE OF OKLAHOMA
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2 2nd Session of the 60th Legislature (2026)
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3 SENATE BILL 2141 By: Grellner
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6 AS INTRODUCED
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7 An Act relating to agricultural and environmental
7 protection; creating the Oklahoma PFAS-Safe Biosolids
8 and Farmland Protection Act; providing short title;
8 defining terms; regulating land application of
9 biosolids and septage; requiring testing of per- and
9 polyfluoroalkyl substances (PFAS) prior to land
10 application; establishing PFAS tiers; providing
10 corresponding management requirements of PFAS tiers;
11 providing for enforcement or reporting and penalties;
11 providing for rulemaking; providing for
12 noncodification; providing for codification; and
12 providing an effective date.
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15 BE IT ENACTED BY THE PEOPLE OF THE STATE OF OKLAHOMA:
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16 SECTION 1. NEW LAW A new section of law not to be
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17 codified in the Oklahoma Statutes reads as follows:
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18 This act shall be known and may be cited as the "Oklahoma PFAS-
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19 Safe Biosolids and Farmland Protection Act".
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20 SECTION 2. NEW LAW A new section of law to be codified
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21 in the Oklahoma Statutes as Section 2-42 of Title 2, unless there is
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22 created a duplication in numbering, reads as follows:
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23 As used in this act:
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Req. No. 3501 Page 1
1 1. "Agricultural land" means cropland, pasture, rangeland,
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2 orchards, or other land used for growing food or feed crops or for
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3 grazing or raising livestock;
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4 2. "Biosolids" means treated sewage sludge derived from
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5 municipal or domestic wastewater treatment plants that meets federal
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6 and state criteria for land application to improve soil or fertilize
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7 crops;
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8 3. "Generator" means any publicly owned treatment works,
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9 wastewater treatment facility, septage hauler, or other entity that
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10 produces or manages human-derived biosolids or septage for land
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11 application;
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12 4. "Human manure" means sewage sludge, biosolids, or domestic
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13 septage derived from human excreta and other domestic wastewater
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14 streams intended for land application;
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15 5. "Land application" means the placement or spreading of
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16 biosolids, human manure, or septage on or into the soil surface or
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17 subsoil of agricultural land for agronomic or soil-conditioning
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18 purposes; and
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19 6. "PFAS" means per- and polyfluoroalkyl substances, including
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20 but not limited to PFOA, PFOS, PFHxS, PFNA, PFHxA, and any
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21 additional compounds designated by the Department of Environmental
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22 Quality by rule.
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Req. No. 3501 Page 2
1 SECTION 3. NEW LAW A new section of law to be codified
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2 in the Oklahoma Statutes as Section 2-43 of Title 2, unless there is
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3 created a duplication in numbering, reads as follows:
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4 A. No human-derived biosolids or septage shall be land-applied
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5 to agricultural land in this state unless the material has been
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6 sampled and analyzed for PFAS by a laboratory accredited for PFAS in
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7 solids using EPA Method 1633 or a successor method approved by the
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8 Department of Environmental Quality.
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9 B. Generators intending to land-apply biosolids or septage on
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10 agricultural land shall:
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11 1. Conduct PFAS testing at a minimum frequency based on annual
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12 production volume, as specified by the Department of Environmental
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13 Quality by rule, which shall be no less than once per year and no
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14 more than once per month; and
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15 2. Analyze, at a minimum, for PFOA, PFOS, PFHxS, PFNA, and any
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16 other PFAS compounds designated by the Department of Environmental
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17 Quality.
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18 C. Test results shall be reported to the Department of
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19 Environmental Quality and made available to landowners and operators
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20 of receiving agricultural land prior to any land application event.
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21 SECTION 4. NEW LAW A new section of law to be codified
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22 in the Oklahoma Statutes as Section 2-44 of Title 2, unless there is
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23 created a duplication in numbering, reads as follows:
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Req. No. 3501 Page 3
1 A. The Department of Environmental Quality shall establish a
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2 tiered PFAS concentration framework for biosolids and septage
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3 intended for land application, modeled on approaches adopted in
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4 other states, including but not limited to "unrestricted",
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5 "restricted", "conditional", and "prohibited" categories.
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6 B. Until rules and procedures are adopted, the following
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7 interim tiers shall apply based on the sum of PFOA and PFOS in
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8 biosolids or septage, which shall be measured on a dry weight basis:
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9 1. Tier 1: Less than twenty micrograms per kilogram (20 g/kg)
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10 total PFOA plus PFOS. Land application on agricultural land shall
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11 be permitted in accordance with existing biosolids regulations, with
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12 no additional PFAS-related restrictions beyond routine monitoring;
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13 2. Tier 2: Twenty to fifty micrograms per kilogram (20 to 50
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14 g/kg) total PFOA plus PFOS. Land application on agricultural land
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15 shall be permitted only at reduced application rates determined by
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16 the Department of Environmental Quality, with written notice to the
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17 receiving landowner, operator, and local conservation district;
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18 3. Tier 3: Greater than fifty to one hundred micrograms per
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19 kilogram (50 to 100 g/kg) total PFOA plus PFOS. Land application
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20 on agricultural land shall be subject to strict rate limits,
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21 enhanced recordkeeping, and implementation of a source
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22 identification and reduction plan for upstream PFAS sources. The
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23 Department of Environmental Quality may further restrict or suspend
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24 land application under this tier based on local conditions; and
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Req. No. 3501 Page 4
1 4. Tier 4: Greater than one hundred micrograms per kilogram
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2 (100 g/kg) total PFOA plus PFOS. Land application on agricultural
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3 land shall be prohibited. Generators shall utilize alternative
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4 disposal or treatment methods authorized by the Department of
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5 Environmental Quality, and a source identification and reduction
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6 plan shall be mandatory.
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7 C. The Department of Environmental Quality may adopt more
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8 protective tier thresholds, additional PFAS analytes, or total PFAS
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9 metrics by rule based on emerging science, EPA guidance, or state
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10 risk assessments.
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11 SECTION 5. NEW LAW A new section of law to be codified
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12 in the Oklahoma Statutes as Section 2-45 of Title 2, unless there is
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13 created a duplication in numbering, reads as follows:
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14 A. Before any land application of human-derived biosolids or
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15 septage, the generator or applicator shall provide the landowner and
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16 farm operator with:
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17 1. The most recent PFAS test results, including concentrations
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18 of each analyte measured; and
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19 2. Written identification of the applicable tier under Section
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20 4 of this act and any associated restrictions.
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21 B. Land application shall not occur on agricultural land unless
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22 the landowner or authorized operator has provided written consent
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23 acknowledging receipt of PFAS test results and tier information.
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Req. No. 3501 Page 5
1 SECTION 6. NEW LAW A new section of law to be codified
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2 in the Oklahoma Statutes as Section 2-46 of Title 2, unless there is
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3 created a duplication in numbering, reads as follows:
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4 A. The Department of Environmental Quality, in consultation
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5 with the Oklahoma Department of Agriculture, Food, and Forestry,
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6 shall adopt additional safeguards for land application of biosolids
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7 on land used for:
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8 1. Production of food crops for direct human consumption;
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9 2. Production of animal feed, including hay and pasture; and
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10 3. Grazing of livestock.
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11 B. Such safeguards may include:
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12 1. Additional PFAS testing of soil, forage, or milk where
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13 biosolids have been applied;
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14 2. Use restrictions, holding periods, or crop limitations
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15 following land application; and
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16 3. Prohibitions on land application in sensitive areas such as
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17 wellhead protection zones and shallow groundwater regions.
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18 SECTION 7. NEW LAW A new section of law to be codified
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19 in the Oklahoma Statutes as Section 2-47 of Title 2, unless there is
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20 created a duplication in numbering, reads as follows:
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21 A. Generators and applicators shall maintain records of PFAS
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22 testing, land application locations, dates, rates, and receiving
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23 landowner information for a period of at least ten (10) years.
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Req. No. 3501 Page 6
1 B. The Department of Environmental Quality shall maintain a
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2 publicly accessible online database of:
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3 1. Registered biosolids generators and applicators;
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4 2. Summary PFAS test results; and
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5 3. General locations of agricultural land where biosolids have
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6 been applied at a mapped or township-range level.
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7 SECTION 8. NEW LAW A new section of law to be codified
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8 in the Oklahoma Statutes as Section 2-48 of Title 2, unless there is
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9 created a duplication in numbering, reads as follows:
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10 The Department of Environmental Quality may issue orders,
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11 suspend or revoke permits, and assess civil penalties for violations
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12 of this act or rules adopted under it, including land application
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13 without required PFAS testing, land application above authorized
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14 tiers, or falsification of test results. Each day of noncompliance
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15 and each discrete land application event in violation of this act
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16 may be treated as a separate violation for purposes of penalties.
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17 SECTION 9. NEW LAW A new section of law to be codified
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18 in the Oklahoma Statutes as Section 2-49 of Title 2, unless there is
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19 created a duplication in numbering, reads as follows:
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20 The Environmental Quality Board is authorized and directed to
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21 promulgate rules necessary to implement this act, including but not
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22 limited to rules regarding test frequency, additional PFAS analytes,
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23 tier thresholds, application rate formulas, and coordination with
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24 federal regulations and guidance.
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Req. No. 3501 Page 7
1 SECTION 10. This act shall become effective November 1, 2026.
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3 60-2-3501 YG 1/15/2026 1:33:07 PM
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Req. No. 3501 Page 8Every fact on this page links to its source, starting with the official bill record.