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Northeast District - St Johns River at a Glance Highlights

County Dock

Aerial Map
(Click to enlarge)County Dock Arial Map

Latitude: 30˚10.107' N
Longitude: 81˚38.905'W

Location
At the end of County Dock Road and in the vicinity of Mandarin

Water Characteristics
Oligohaline (slightly more saline and fluctuates between fresh and brackish)

Land Use
Medium density residential, low density residential, forest natural

County Dock
STORET #20030458

County Dock Photo
Most Recent Data
Sample Date Temperature
(F)		 pH Salinity
(ppt)		 Turbidity
(NTU)		 Total
coliform
(CFU)		 Fecal
Coliform
(CFU)		 Dissolved
Oxygen
(mg/l)		 Chlorophyll A Total Nitrogen[TKN+(NO2+N03)] Total Phosphorus as P
Trend Graphs graph N/A graph graph graph graph graph graph graph graph
6/5/08 86 8.11 7.2 NA NA 2 8.3 NA 1.211 NA
4/7/08 72 7.54 2.8 12 NA 20 7.9 16 1.142 0.1
2/4/08 61 8.15 1 7 16 17 10.6 NS NS NS
12/3/07 68 7.75 0.8 9.2 100 17 10 14 1.61 0.12
10/1/07 79 7.34 7.9 6.1 NA 4 6.8 NS NS NS
8/6/07 88 7.28 12 2.8 10 4 4.3 8.1 1.59 0.19
6/4/07 78 7.73 13 4.5 30 4 7.4 NS NS NS
4/2/07 76 7.93 4.1 5.3 4 4 8.6 16 0.985 .01
2/5/07 54 7.9 1.6 9.8 29 20 10.7 NS NS NS
12/4/06 64 7.55 6.29 5.7 23 4 8 1.7 - -
10/2/06 82 7.09 7.6 3.3 10 4 6.8 NS - -
8/7/06 91 7.76 5 4.6 5 5 7.8 18 - -
6/5/06 83 7.55 8.2 1.9 48 24 6.8 NS - -
4/3/06 74 7.3 2 4.1 8 8 7.4 0.85 - -
2/06/06 58 NA 0.2 6.3 207 113 9.9 NS - -
12/13/05 56 7.68 0.3 6.2 63 16 9.6 0.85 - -

NS = Not Sampled

For expanded data set enter Florida STORET and enter STORET ID #20030764
River At a Glance STORET Retrieval Instructions

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Water Quality Graphs

Dissolved Oxygen

Water Quality Graph
Click to enlarge
2004-2006 Graph

Salinity

Water Quality Graph
Click to enlarge
2004-2006 Graph

Total and Fecal Coliform

Water Quality Graph

Click to enlarge
2004-2006 Graph

Nutrients
(Chlorophyll A)

Water Quality Graph
Click to enlarge
2004-2006 Graph

Water Temperature

Water Quality Graph

Click to enlarge
2004-2006 Graph

Turbidity

Water Quality Graph
Click to enlarge
2004-2006 Graph

Total Nitrogen
Water Quality Graph
Click to enlarge

Total Phosphorous

Water Quality Graph

Click to enlarge

  

 

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River at a Glance

Sample Locations & Results

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Last updated: August 25, 2008
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