Middle St. Johns - Florida Department of Environmental Protection

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Water Quality Assessment Report: Middle St. Johns
Listed below are the verified impaired segments in the planning unit,
with the parameters for which they are impaired.
St. Johns River Above Wekiva River Nutrients (chlorophyll a)
Lake Monroe
DO, nutrients (TSI)
St. Johns River Above Lake Monroe DO, nutrients (chlorophyll a)
Lake Marie
Nutrients (TSI)
Smith Canal
DO, fecal coliform bacteria,
iron
DeForest Lake Outlet
DO
DeForest Lake
Nutrients (TSI)
Lake Jesup Near St. Johns River Nutrients (TSI)
Lake Monroe is a eutrophic lake with fair water quality. Parameters
of concern include DO, nutrients silver. Water quality in Lake Monroe
has become more stable since 1997. Recent results have shown high levels
of phosphorus and have produced fair to poor WQI and TSI ratings
(URS, 2001).
Two segments of the St. Johns River also show potential impairment.
The St. Johns River above the Wekiva River is impaired for nutrients. The
St. Johns River above Lake Monroe has low DO and elevated nutrients
levels. The segment of Lake Jesup in the Lake Monroe planning unit
is impaired for nutrients. Smith Canal is verified impaired for coliform
bacteria, DO, and iron. It is potentially impaired for biology and turbidity
based on two failed bioassessments in 1993 and 1997.
Permitted Discharges and Land Uses
Point Sources. There are 23 permitted point source dischargers in
the planning unit. Of these, 15 are domestic wastewater facilities, 5 are
industrial wastewater facilities, 2 are concrete batch plants, and 1 is a petroleum
cleanup facility. Five are NPDES-permitted, and 3 are permitted
to discharge more than 0.100 mgd. The Florida Power and Light (FPL)
Sanford Power Plant is permitted for the largest discharge, at 180 mgd.
Appendix G lists, by planning unit, the permitted dischargers in the basin.
Four of the wastewater treatment facilities in the planning unit
implement wastewater reuse, with at least 5.59 mgd discharged for reuse
purposes. The sites permitted for these types of reuse are Deltona Lakes
(domestic wastewater, permitted to 1.4 mgd, irrigation reuse), Sanford/
North (domestic wastewater, permitted to 7.3 mgd, flow mostly to public
reuse, with an allowable annual average surface discharge of 1.0 mgd),
Twelve Oaks RV Resort (permitted to .025 mgd, reuse to two percolation
ponds), and Volusia County Utilities Department/Deltona North
(domestic wastewater, permitted to 1.2 mgd, reuse for public irrigation and
to percolation ponds).
The planning unit contains 1 active state-funded hazardous waste site,
as well as 1 closed Class I, 1 closed Class II, and 1 active Class III solid
waste landfills. There are also 11 delineated ground water contamination
areas under Chapter 62-524, F.A.C., Potable Water Well Permitting in