Middle St. Johns - Florida Department of Environmental Protection

10 Water Quality Assessment Report: Middle St. Johns
During the next few years, considerable data analysis will be done
to establish TMDLs for impaired waters in the Middle St. Johns Basin,
establish the initial allocations of pollutant load reductions needed to meet
those TMDLs, and produce a Basin Management Action Plan (B-MAP) to
reduce the amount of pollutants that cause impairments. These activities
depend heavily on the active participation of the water management district,
local governments, businesses, and other stakeholders. The Department
will work with these organizations and individuals to undertake or
continue reductions in the discharge of pollutants and achieve the established
TMDLs for impaired waterbodies.
Summary of Findings
The Middle St. Johns Basin is delineated into 428 waterbodies or segments.
Of the total, 104 segments met at least 1 of their designated uses,
but another 208 segments either had no data or insufficient data to make
a determination of impairment. Overall, the Department’s assessment
shows that 58 waterbodies or waterbody segments in the Middle St. Johns
Basin are impaired and require the development of TMDLs. Another
58 segments are potentially impaired, but a causative pollutant was not
identified or there was insufficient data to meet the verification threshold.
Five waterbodies meet the impairment threshold for dissolved oxygen
(DO), but not because of a specific pollutant (Category 4b). The following
summarizes, by planning unit, impairments by waterbody types and
the primary pollutants. Planning units are smaller areas in the basin that
provide a more detailed geographic basis for identifying and assessing water
quality improvement activities.
Alexander Springs Creek Planning Unit
Of the 16 waterbody segments in the Alexander Springs Creek planning
unit, 5 segments have sufficient data for assessment. Of the assessed
segments, none are verified impaired for at least 1 parameter assessed,
1 remains on the Planning List, and 4 meet standards.
Waterbodies listed on the Planning List have potential impairments,
but need further evaluation. A waterbody listed on the Verified List as
impaired for a specific parameter may also be listed on the Planning List
for a different parameter(s). The waterbody listed on the Planning List is
Buck Lake
Fecal and total coliforms
Deep Creek Planning Unit
Out of the 25 waterbody segments in the Deep Creek planning unit,
8 segments have sufficient data for assessment. Of these, 4 are verified
impaired for at least 1 parameter assessed, 2 remain on the Planning List,
and 2 meet standards.