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Alternative Surface Water Quality Standards

Nutrient Level II WQBELs for Gainesville Regional Utilities

The Florida Department of Environmental Protection hosted a public hearing at 9 a.m. EDT on June 21, 2022 on proposed nutrient Level II Water Quality Based Effluent Limitations (WQBELs) for Gainesville Regional Utilities (GRU) Main Street Water Reclamation Facility (MSWRF) and the John R. Kelly Generating Station (KGS) for Sweetwater Branch.

These nutrient Level II WQBELs will constitute site-specific numeric interpretations of the narrative nutrient criterion set forth in paragraph 62-302.530(48)(b), F.A.C., for Sweetwater Branch and replace the otherwise applicable numeric nutrient criteria in subsection 62-302.531(2), F.A.C., for this water.

Links to the technical documentation supporting the proposed Level II WQBEL, the public hearing agenda, and public hearing presentation are located below:

Site Specific Interpretations of the Narrative Nutrient Criterion

Numeric nutrient criteria that are approved Hierarchy 1interpretations of the narrative nutrient criteria under Rule 62-302.531(2)(a), F.A.C., can include Total Maximum Daily Loads (TMDLs), Level II Water Quality-Based Effluent Limits (WQBELs), Reasonable Assurance Plans (RAPs) and Site Specific Alternative Criteria (addressed above).

    Site Specific Alternative Criteria

    Site specific alternative criteria (SSAC) replace the criteria applicable statewide in cases where site specific information supports different numeric criteria. Any SSAC must fully support and protect the designated use of the waterbody. SSACs fall into three types: Type I, Type II and Type III.

    • Type I SSACs (Rule 62-302.800(1), F.A.C.) are established to reflect natural background conditions, such as lower dissolved oxygen levels than the statewide default criteria.
    • Type II SSACs (Rule 62-302.800(2), F.A.C) are established for situations other than natural background conditions.
    • Type III SSACs (Rule 62-302.800(3), F.A.C.) are limited to nutrient criteria.

    All types of SSACs must still fully protect the designated use of the water body.

    Examples of site specific criteria include the Everglades phosphorus criterion (Rule 62-302.540, F.A.C.) and the Site Specific Alternative Criteria described in Rule 62-302.800, F.A.C.

    FPL SSAC for Total Ammonia Nitrogen

    The Florida Department of Environmental Protection hosted a virtual public workshop on Wednesday, Oct. 7, 2020, 9 a.m. to present Florida Power and Light’s (FPL) petition to establish a Site Specific Alternative Criterion (SSAC) for Total Ammonia Nitrogen (TAN) for the Northwest Mitigation Area wetlands and Barley Barber Swamp in Martin County, Florida.

    Please contact Kaitlyn Sutton (850-245-8819) or Nia Wellendorf (850-245-8190) if you have any questions about the public workshop or proposed SSAC.

    Links to the technical documentation supporting the proposed SSAC, a map of the proposed SSAC area, draft rule language, an agenda for the public workshop, the public workshop presentation and comments received are located below.

    Water Quality Standards Variances

    Charlotte Harbor Water Association (variance for acute toxicity)

    Premier Chemicals (variance for acute toxicity)

    City of Vero Beach Reverse Osmosis (variance for acute toxicity)

    Last Modified:
    November 2, 2022 - 12:38pm

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