Middle St. Johns - Florida Department of Environmental Protection

160
Water Quality Assessment Report: Middle St. Johns
Table 4.2 (contined)
Planning
Unit
Lake
Jesup
Lake
Jesup
Lake
Jesup
Lake
Jesup
WBID
Waterbody
Segment
2992 Sweetwater
Creek
Waterbody
Type
1998
303(d)
Parameters
of Concern
Parameters
Identified
Using
the 2002
Impaired
Surface
Waters Rule
Priority for
TMDL
Development *
Projected
Year for TMDL
Development *
Comments
Stream DO Medium 2008 Planning period: 88/100
values below DO criterion;
verified period: 74/93 values
below DO criterion. DO met
verification threshold of IWR
and P is causative pollutant
(TP median = 0.31 mg/L).
158 DO values, median 3.2
mg/L, mean 3.47 mg/L, range
0.15–9.71 mg/L. One failed
bioassessment in 1997.
2994D Island Lake Lake Nutrients
(TSI)
2994Y
2997A
Fruitwood
Lake
Howell
Creek
Lake
Stream
Nutrients
(TSI)
Fecal
Coliform
Bacteria
Medium 2008 P limited based on a TN/TP
median of 36 (12 values)
during the verified period.
Planning period: 0 TSI
annual means exceeded 60;
verified period: 1 TSI annual
mean exceeded 60 (2001).
12 TP values, median 0.05
mg/L, mean 0.28 mg/L.
Medium 2008 Colimitation of N and P
based on a TN/TP median
of 17 (224 values) during the
planning period and a median
of 17 (84 values) during
the verified period. Planning
period: 4 TSI annual means
exceeded 60 (1993–1996);
verified period: 1 TSI annual
mean exceeded 60 (1996).
224 TN values, median 0.84
mg/L, mean 1.03 mg/L. 224
TP values, median 0.05 mg/L,
mean 0.07 mg/L.
Medium 2008 Planning period: 13/41
values exceed criterion;
verified period: 9/22 values
exceed criterion. Coliform
median 200 colonies/100 ml,
range 10–3400 colonies/
100 ml. No more than 3
values per month.