The bill, S.B. No. 2350, proposes the establishment of maximum allowable ground level concentrations of hydrogen sulfide by the Texas Commission on Environmental Quality (TCEQ) to protect public health. It introduces a new section, 382.0217, to the Health and Safety Code, which mandates the TCEQ to create rules for these maximum concentrations and to review health studies related to hydrogen sulfide emissions at least once every five years. The bill specifies that the TCEQ may set different concentration limits based on land use, such as residential, recreational, business, commercial, or agricultural purposes.

Additionally, the bill stipulates that emissions of hydrogen sulfide must not exceed 0.04 parts per million averaged over any 30-minute period if they affect properties used for residential or similar purposes, and 0.06 parts per million for other types of properties. It also requires the TCEQ to classify violations of these established concentrations as having major significance under the Water Code. The TCEQ is required to adopt the necessary rules by September 1, 2026, and the act will take effect on September 1, 2025.

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