Middle St. Johns - Florida Department of Environmental Protection

166
Water Quality Assessment Report: Middle St. Johns
Table 4.2 (contined)
Planning
Unit
Lake
Monroe
Unit
Lake
Monroe
Unit
Lake
Monroe
Unit
Lake
Monroe
Unit
Lake
Monroe
Unit
WBID
Waterbody
Segment
2962 Smith
Canal
2962 Smith
Canal
2973 DeForest
Lake Outlet
2973F
2981A
DeForest
Lake
Lake Jesup
Near
St. Johns
River
Waterbody
Type
Stream
1998
303(d)
Parameters
of Concern
Coliform
Bacteria
Parameters
Identified
Using
the 2002
Impaired
Surface
Waters Rule
Fecal
Coliform
Bacteria
Priority for
TMDL
Development *
Projected
Year for TMDL
Development *
Comments
Low 2008 Planning period: 1/4 values
exceed criterion; verified
period: 8/30 values exceed
criterion. Coliform median
247 colonies/100 ml, range
1–870 colonies/100 ml. No
more than 2 values per
month.
Stream Iron Iron Low 2008 Planning period: 0/1 values
exceed criterion; verified
period: 7/22 values exceed
criterion.
Stream DO Medium 2008 Planning period: 12/17
values below DO criterion;
verified period: 17/25 values
below DO criterion. DO met
verification threshold of IWR
and BOD is causative pollutant
(BOD median = 3.8
mg/L). 25 DO values, median
3.5 mg/L, mean 3.89 mg/L,
range 1.46–7.1 mg/L.
Lake
Nutrients
(TSI)
Lake Nutrients Nutrients
(TSI)
Medium 2008 Colimitation of N and P based
a TN/TP median of 33 (36
values) in the planning period
and a median of 33 (44
values) in the verified period.
Planning period: 1 TSI
annual mean exceeded 60
(1999); verified period: 1 TSI
annual mean exceeded 60
(1999). 18 TN values, median
0.86 mg/L. 44 TP values,
median 0.027 mg/L.
High 2004 Colimitation of N and P based
on a TN/TP median of 19
(100 values) during the planning
period and a median
of 20 (86 values) during the
verified period. Planning
period: 5 TSI annual means
exceeded 60 (1995–1999);
verified period: 4 TSI annual
means exceeded 60 (1996–
1999). 68 TN values, median
2.2 mg/L. 109 TP values,
median 0.11 mg/L.