Middle St. Johns - Florida Department of Environmental Protection

Water Quality Assessment Report: Middle St. Johns
163
Table 4.2 (contined)
Planning
Unit
Lake
Jesup
Lake
Jesup
Lake Kerr
Unit
WBID
Waterbody
Segment
Waterbody
Type
1998
303(d)
Parameters
of Concern
Parameters
Identified
Using
the 2002
Impaired
Surface
Waters Rule
2997S Lake Spring Lake Nutrients
(TSI)
3009 Bear Gulley
Lake
2905C
Wildcat
Lake
Lake
Lake
Nutrients
(TSI)
Mercury in
Fish
Priority for
TMDL
Development *
Projected
Year for TMDL
Development *
Comments
Medium 2008 Colimitation by N and P
based on a TN/TP median
of 16 (60 values) during the
planning period and a median
of 17 (31 values) during the
verified period. Planning
period: 4 TSI annual means
exceeded 60 (1992–1994,
1996); verified period: 1 TSI
annual mean exceeded 60
(1996). 14 TN values, median
0.01 mg/L, mean 0.01 mg/L.
80 TP values, median 0.07
mg/L, mean 0.07 mg/L.
Medium 2008 P limited based on a TN/TP
median of 30 (40 values)
during the planning period
and a median of 30 (66
values) during the verified
period. Planning period: 1
TSI annual mean exceeded
60 (1999); verified period: 3
TSI annual means exceeded
60 (1999–2002). 51 TN
values, median 1.12 mg/L,
mean 1.15 mg/L. 66 TP
values, median 0.038 mg/L,
mean 0.04 mg/L.
Medium 2011 Mercury in Fish met verification
threshold of IWR. Fish
tissue levels in 20 samples
averaged 0.8480 ppm in
2000.