Middle St. Johns - Florida Department of Environmental Protection

308 Water Quality Assessment Report: Middle St. Johns
WBID
Waterbody
Segment Name
Waterbody
Type
Waterbody
Class
1998 303(d)
Parameters
of Concern
Parameters
Identified Using
the IWR
Proposed
Status
2997Q Lake Dot Lake 3F Nutrients (TSI) Not
Impaired
2997Q Lake Dot Lake 3F Un-Ionized
Ammonia
Not
Impaired
2997R Lake Adair Lake 3F Dissolved Oxygen Not
Impaired
2997R Lake Adair Lake 3F Fecal Coliform Not
Bacteria Impaired
2997R Lake Adair Lake 3F Nutrients (TSI) Verified
List
2997R Lake Adair Lake 3F Un-Ionized
Ammonia
Planning
List
2997S Lake Spring Lake 3F Dissolved Oxygen Not
Impaired
Integrated
Report
Category 1
Priority
for
TMDL
Development
Projected
Year for
TMDL
Development
Comments 3
(# Exceedances/ # Samples)
PP= Planning Period VP= Verified
Period
2 Annual mean for 2000 was above
threshold, but resulted from
violations of the City of Orlando's
Environmental Resource Permit (4-
095-0204GMT). Co-limitation of
nitrogen and phosphorus based on
a TN/TP median of 23 (321 values)
during the PP and a median of 20
(232 values) during the VP. PP - 1
TSI annual mean exceeded 60
(2000). VP - 1 TSI annual mean
exceeded 60 (2000). 337 TN
values, median 0.77 mg/L, mean
0.78 mg/L. 337 TP values, median
0.03 mg/L, mean 0.04 mg/L.
2
2
2
5 Medium 2008 Co-limitation of nitrogen and
phosphorus based on a TN/TP
median of 13 (321 values) during
the PP and a median of 15 (231
values) during the VP. PP - 9 TSI
annual means exceeded 60 (1991-
2000). VP - 5 TSI annual means
exceeded 60 (1996-2001) and 1 TSI
annual mean exceeded 40 (2002).
337 TN values, median 1.02 mg/L,
mean 1.10 mg/L. 333 TP values,
median 0.08 mg/L, mean 0.10 mg/L.
3c PP - 4/23 values exceed criterion.
VP - 1/11 values exceed criterion.
2