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Upper Lemon Bay Condition Report for 2015

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Caution

1 out of 3 indicators were rated as PASS.

All three indicators must pass
for the bay to be rated as PASS.

Learn more about how this report is created

Summary:

Water quality indicators for Upper Lemon Bay showed a mixed message for 2015. After an improvement in chlorophyll a concentration in 2014, this water quality measure increased by over 21% in 2015, a worrisome sign. However, the mean concentration of both total nitrogen and total phosphorus improved somewhat, and dissolved oxygen levels were also slightly better. The higher chlorophyll a levels downgraded the rating for that water quality measure from “Good” back down to “Caution”, causing the overall rating for Upper Lemon Bay also to decrease to “Caution”.

Water Quality: Chlorophyll a mean concentration in 2015 was of 0.0107 mg/l, exceeding the threshold of 0.0089 mg/l. Mean nitrogen concentration improved slightly, to 0.5948 mg/l, but was still slightly above the threshold of 0.540 mg/l. Mean phosophorus concentration also was slightly lower, and at 0.1297 mg/l is “Excellent”, roughly half the threshold concentration. The mean for chlorophyll a was calculated as an arithmetic mean and the means for nitrogen and phosphorus were calculated as geometric means (per the Numeric Nutrient Criteria outlined in the Florida Administrative Code, section 62-302.532).

Biotic Indicator: Measurement of the biotic indicator, seagrass, was performed in 2014 by the Southwest Florida Water Management District. Between 2012 to 2014, seagrass coverage in Lemon Bay (including both the Upper and Lower segments) increased from 3,727 to 3,913 acres, exceeding the combined target value of 3,890 acres. Upper Lemon Bay was not surveyed separately, but has a target level of 1,010 acres.

Bay Location Map

Bays included in this report:

Water Chemistry Ratings

Total nitrogen, total phosphorus, and chlorophyll a levels are monitored carefully by water resource managers and used by regulatory authorities to determine whether a bay meets the water quality standards mandated by the Clean Water Act. The trend graphs for these indicators are shown below, along with their target and threshold values. A target value is a desirable goal to be attained, while a threshold is an undesirable level which is to be avoided. Learn More about these ratings and how they are calculated »

The Five-year Trend Graphs below illustrate the general trend of water quality parameters. They show a six-month running average, which moderates high and low values in the data.

Caution

Chlorophyll a

Score: Caution How was this determined?
Units: mg/l Year
2015
Historical
period of record
High 0.0479 0.088
Mean 0.0106 0.0092 0.00890418 0.0067000000
Low 0.0015 0.0004
No. of Samples 86 1,554

Five-year Trend Graph

     
1/1/20112.4880.0024800mg/l
2/1/20114.6480.0035600mg/l
3/1/20115.6980.0042700mg/l
4/1/20116.9180.0049300mg/l
5/1/20117.1980.0053800mg/l
6/1/20116.0980.0055000mg/l
7/1/201111.6680.0070300mg/l
8/1/201125.0680.0104300mg/l
9/1/20117.9580.0108100mg/l
10/1/201110.1470.0113500mg/l
11/1/20114.3580.0108800mg/l
12/1/20113.9370.0105200mg/l
1/1/20124.5370.0093300mg/l
2/1/20126.8280.0062900mg/l
3/1/20128.6480.0064000mg/l
4/1/20128.8080.0061800mg/l
5/1/20128.1470.0068100mg/l
6/1/20126.8980.0073000mg/l
7/1/201211.6880.0085000mg/l
8/1/201229.2880.0122400mg/l
9/1/201211.3460.0126900mg/l
10/1/20129.5470.0128100mg/l
11/1/20128.4770.0128700mg/l
12/1/20126.8980.0128700mg/l
1/1/201317.6280.0138600mg/l
2/1/20134.1880.0096700mg/l
3/1/20133.3880.0083500mg/l
4/1/20138.0680.0081000mg/l
5/1/20135.3670.0075800mg/l
6/1/20139.8780.0080800mg/l
7/1/201337.9370.0114600mg/l
8/1/201329.8270.0157400mg/l
9/1/201320.3180.0185600mg/l
10/1/201342.0380.0242200mg/l
11/1/201312.6480.0254300mg/l
12/1/20136.6880.0249000mg/l
1/1/20144.8280.0193800mg/l
2/1/20144.6480.0151900mg/l
3/1/20146.1580.0128300mg/l
4/1/20142.8080.0062900mg/l
5/1/20146.0580.0051900mg/l
6/1/20146.7180.0052000mg/l
7/1/201411.7780.0063500mg/l
8/1/20148.7580.0070400mg/l
9/1/201421.6580.0096200mg/l
10/1/201421.0080.0126600mg/l
11/1/20145.1680.0125100mg/l
12/1/20145.6870.0123400mg/l
1/1/20156.1570.0114000mg/l
2/1/20154.3080.0106600mg/l
3/1/20154.7570.0078400mg/l
4/1/20153.7780.0049700mg/l
5/1/20154.9180.0049300mg/l
6/1/201510.6380.0057500mg/l
7/1/20158.8270.0062000mg/l
8/1/201527.1470.0100000mg/l
9/1/201515.6170.0118100mg/l
10/1/201514.8660.0136600mg/l
11/1/201521.3150.0164000mg/l
12/1/201512.3260.0166800mg/l
Loading Chart...
Target
0.0067 mg/l
Threshold
0.0089 mg/l
Caution

Nitrogen, Total

Score: Caution How was this determined?
Units: mg/l Year
2015
Historical
period of record
High 1.104 2.80
Mean 0.5961 0.27421543 0.5200000000
Low 0.245 0.00
No. of Samples 86 1,553

Five-year Trend Graph

     
1/1/2011347.3880.3473800mg/l
2/1/2011469.0080.4081900mg/l
3/1/2011587.0080.4677900mg/l
4/1/2011556.8880.4900700mg/l
5/1/2011543.7580.5008000mg/l
6/1/2011575.0080.5131700mg/l
7/1/2011650.0080.5636100mg/l
8/1/2011903.6380.6360400mg/l
9/1/2011651.3880.6467700mg/l
10/1/2011512.4370.6393700mg/l
11/1/2011485.1380.6296000mg/l
12/1/2011473.7170.6127100mg/l
1/1/2012426.8670.5755200mg/l
2/1/2012543.5080.5155000mg/l
3/1/2012641.7580.5139000mg/l
4/1/2012583.7580.5257800mg/l
5/1/2012507.0070.5294300mg/l
6/1/2012451.1380.5256700mg/l
7/1/2012734.1380.5768800mg/l
8/1/2012853.5080.6285400mg/l
9/1/2012749.3360.6464700mg/l
10/1/2012714.2970.6682300mg/l
11/1/2012550.2970.6754500mg/l
12/1/2012418.7580.6700500mg/l
1/1/2013641.0080.6545300mg/l
2/1/2013487.0080.5934400mg/l
3/1/2013395.3880.5344500mg/l
4/1/2013549.2580.5069500mg/l
5/1/2013516.8670.5013700mg/l
6/1/2013619.7580.5348700mg/l
7/1/20131044.2970.6020900mg/l
8/1/20131010.1470.6892800mg/l
9/1/2013914.8880.7758600mg/l
10/1/20131098.7580.8674500mg/l
11/1/2013670.1380.8929900mg/l
12/1/2013580.5080.8864500mg/l
1/1/2014474.5080.7914800mg/l
2/1/2014603.8880.7237700mg/l
3/1/2014581.7580.6682500mg/l
4/1/2014594.6380.5842300mg/l
5/1/2014615.7580.5751700mg/l
6/1/2014577.7580.5747100mg/l
7/1/2014669.5080.6072100mg/l
8/1/2014716.0080.6259000mg/l
9/1/2014969.0080.6904400mg/l
10/1/2014981.5080.7549200mg/l
11/1/2014615.8880.7549400mg/l
12/1/2014591.0070.7571500mg/l
1/1/2015617.7170.7485200mg/l
2/1/2015412.3880.6979100mg/l
3/1/2015540.8670.6265600mg/l
4/1/2015401.5080.5298900mg/l
5/1/2015546.5080.5183300mg/l
6/1/2015653.3880.5287200mg/l
7/1/2015669.1470.5372900mg/l
8/1/2015934.8670.6243700mg/l
9/1/2015764.2970.6616100mg/l
10/1/2015698.6760.7111400mg/l
11/1/2015747.8360.7447000mg/l
12/1/2015535.0060.7249700mg/l
Loading Chart...
Target
0.52 mg/l
Threshold
0.56 mg/l
Excellent

Phosphorus, Total

Score: Excellent How was this determined?
Units: mg/l Year
2015
Historical
period of record
High 0.30 1.08
Mean 0.13 0.09279655 0.2200000000
Low 0.05 0.016
No. of Samples 86 1,551

Five-year Trend Graph

     
1/1/201161.0080.0610000mg/l
2/1/201183.7580.0723800mg/l
3/1/2011138.7580.0945000mg/l
4/1/2011146.2580.1074400mg/l
5/1/2011132.5080.1124500mg/l
6/1/2011125.0080.1145400mg/l
7/1/2011135.0080.1268800mg/l
8/1/2011196.2580.1456300mg/l
9/1/2011145.0080.1466700mg/l
10/1/201197.1470.1384800mg/l
11/1/2011113.7580.1353600mg/l
12/1/2011100.8670.1313300mg/l
1/1/2012101.4370.1257400mg/l
2/1/2012115.0080.1122000mg/l
3/1/2012176.2580.1174100mg/l
4/1/2012163.7580.1285100mg/l
5/1/2012150.0070.1345500mg/l
6/1/2012108.7580.1358600mg/l
7/1/2012195.0080.1514600mg/l
8/1/2012217.5080.1685400mg/l
9/1/2012196.6760.1719500mg/l
10/1/2012167.1470.1725100mg/l
11/1/2012140.0070.1708400mg/l
12/1/2012106.2580.1704300mg/l
1/1/2013142.5080.1616800mg/l
2/1/201389.2580.1403000mg/l
3/1/2013125.0080.1283600mg/l
4/1/2013119.7580.1204600mg/l
5/1/201365.7170.1080800mg/l
6/1/2013106.0080.1080400mg/l
7/1/2013267.1470.1288100mg/l
8/1/2013198.5770.1470300mg/l
9/1/2013171.2580.1547400mg/l
10/1/2013251.2580.1766500mg/l
11/1/2013156.2580.1917400mg/l
12/1/2013130.0080.1957400mg/l
1/1/2014102.2580.1682600mg/l
2/1/2014115.6380.1544400mg/l
3/1/2014127.5080.1471500mg/l
4/1/2014155.0080.1311100mg/l
5/1/2014151.2580.1302700mg/l
6/1/2014127.5080.1298600mg/l
7/1/2014157.5080.1390600mg/l
8/1/2014136.2580.1425000mg/l
9/1/2014171.2580.1497900mg/l
10/1/2014190.0080.1556300mg/l
11/1/2014143.7580.1543800mg/l
12/1/201490.0070.1481300mg/l
1/1/2015167.1470.1497300mg/l
2/1/2015140.2580.1504000mg/l
3/1/2015105.7170.1394800mg/l
4/1/2015132.5080.1298900mg/l
5/1/201596.7580.1220600mg/l
6/1/2015121.2580.1272700mg/l
7/1/2015109.4370.1176500mg/l
8/1/2015167.1470.1221300mg/l
9/1/2015141.4370.1280800mg/l
10/1/2015161.6760.1329500mg/l
11/1/2015218.3360.1532100mg/l
12/1/2015115.0060.1521700mg/l
Loading Chart...
Target
0.22 mg/l
Threshold
0.26 mg/l

Dissolved Oxygen

Units: mg/l Year
2015
Historical
period of record
High 8.30 12.00
Mean 6.24 6.04 1.58044 0.0000000000
Low 3.10 1.20
No. of Samples 66 2,999

Five-year Trend Graph

     
1/1/20117.1267.1200000mg/l
2/1/20115.47146.3000000mg/l
3/1/20115.43146.0100000mg/l
4/1/20115.5775.9000000mg/l
5/1/20115.0265.7200000mg/l
6/1/20114.9865.6000000mg/l
7/1/20114.42235.1500000mg/l
8/1/20115.36145.1300000mg/l
9/1/20114.54274.9800000mg/l
10/1/20115.8655.0300000mg/l
11/1/20114.72214.9800000mg/l
12/1/20116.3565.2100000mg/l
1/1/20127.7265.7600000mg/l
2/1/20125.3765.7600000mg/l
3/1/20127.23126.2100000mg/l
4/1/20125.53106.1500000mg/l
5/1/20125.2256.2400000mg/l
6/1/20124.7065.9600000mg/l
7/1/20125.78125.6400000mg/l
8/1/20124.3365.4700000mg/l
9/1/20125.2865.1400000mg/l
10/1/20125.1055.0700000mg/l
11/1/20126.59145.3000000mg/l
12/1/20125.7865.4800000mg/l
1/1/20136.4365.5900000mg/l
2/1/20137.4066.1000000mg/l
3/1/20137.44146.4600000mg/l
4/1/20136.1176.6300000mg/l
5/1/20135.7566.4900000mg/l
6/1/20134.8066.3200000mg/l
7/1/20137.3256.4700000mg/l
8/1/20135.2656.1100000mg/l
9/1/20135.8365.8500000mg/l
10/1/20135.6065.7600000mg/l
11/1/20136.1865.8300000mg/l
12/1/20135.7065.9800000mg/l
1/1/20145.7265.7200000mg/l
2/1/20146.9566.0000000mg/l
3/1/20145.7065.9800000mg/l
4/1/20145.9456.0300000mg/l
5/1/20145.8365.9700000mg/l
6/1/20144.7365.8100000mg/l
7/1/20144.6365.6300000mg/l
8/1/20144.1265.1600000mg/l
9/1/20144.4064.9400000mg/l
10/1/20144.1864.6500000mg/l
11/1/20146.2364.7200000mg/l
12/1/20146.3864.9900000mg/l
1/1/20155.3065.1000000mg/l
2/1/20157.1365.6000000mg/l
3/1/20156.4265.9400000mg/l
4/1/20156.1866.2700000mg/l
5/1/20156.0066.2400000mg/l
6/1/20156.0266.1800000mg/l
7/1/20156.2856.3400000mg/l
8/1/20157.8656.4600000mg/l
9/1/20155.4656.3000000mg/l
10/1/20155.6056.2000000mg/l
11/1/20156.2656.2500000mg/l
12/1/20156.4856.3200000mg/l
Loading Chart...
Target
0.00 mg/l
Threshold
0.00 mg/l

Light Attenuation

Units: K(1/m) Year
2015
Historical
period of record
High 3.21 3.85
Mean 1.25 1.1 0.51996 0.0000000000
Low 0.55 0.16
No. of Samples 60 1,046

Five-year Trend Graph

     
1/1/20110.6750.6700000K(1/m)
2/1/20110.9250.8000000K(1/m)
3/1/20111.0550.8800000K(1/m)
4/1/20110.9150.8900000K(1/m)
5/1/20111.1350.9400000K(1/m)
6/1/20110.8950.9300000K(1/m)
7/1/20111.2951.0300000K(1/m)
8/1/20111.4051.1100000K(1/m)
9/1/20111.4251.1700000K(1/m)
10/1/20111.1351.2100000K(1/m)
11/1/20110.8951.1700000K(1/m)
12/1/20111.2751.2300000K(1/m)
1/1/20120.7251.1400000K(1/m)
2/1/20121.0551.0800000K(1/m)
3/1/20121.3351.0700000K(1/m)
4/1/20121.0551.0500000K(1/m)
5/1/20120.8851.0500000K(1/m)
6/1/20120.8050.9700000K(1/m)
7/1/20121.2951.0700000K(1/m)
8/1/20121.4851.1400000K(1/m)
9/1/20122.1051.2700000K(1/m)
10/1/20121.4551.3300000K(1/m)
11/1/20121.3751.4200000K(1/m)
12/1/20120.6851.4000000K(1/m)
1/1/20131.0251.3500000K(1/m)
2/1/20130.6751.2200000K(1/m)
3/1/20130.6150.9700000K(1/m)
4/1/20130.8750.8700000K(1/m)
5/1/20130.8150.7800000K(1/m)
6/1/20130.7750.7900000K(1/m)
7/1/20132.7751.0800000K(1/m)
8/1/20131.7751.2700000K(1/m)
9/1/20131.8151.4700000K(1/m)
10/1/20132.5351.7400000K(1/m)
11/1/20131.0851.7900000K(1/m)
12/1/20131.1551.8500000K(1/m)
1/1/20140.6651.5000000K(1/m)
2/1/20140.8151.3400000K(1/m)
3/1/20140.8051.1700000K(1/m)
4/1/20140.9150.9000000K(1/m)
5/1/20140.6850.8400000K(1/m)
6/1/20140.7450.7700000K(1/m)
7/1/20141.0250.8300000K(1/m)
8/1/20141.2650.9000000K(1/m)
9/1/20141.1950.9700000K(1/m)
10/1/20142.4051.2200000K(1/m)
11/1/20140.7851.2300000K(1/m)
12/1/20140.8751.2500000K(1/m)
1/1/20151.1951.2800000K(1/m)
2/1/20150.9951.2400000K(1/m)
3/1/20150.9451.2000000K(1/m)
4/1/20150.8850.9400000K(1/m)
5/1/20150.7550.9400000K(1/m)
6/1/20150.9250.9500000K(1/m)
7/1/20151.0350.9200000K(1/m)
8/1/20152.2451.1300000K(1/m)
9/1/20151.7551.2600000K(1/m)
10/1/20151.9251.4400000K(1/m)
11/1/20151.2751.5200000K(1/m)
12/1/20151.0651.5500000K(1/m)
Loading Chart...
Target
0.00 K(1/m)
Threshold
0.00 K(1/m)

Rainfall

Units: inches/yr Year
2015
Historical
period of record
High 41.82 66.85
Mean 38.3 17.1882379282148
Low 9.42
No. of Samples 365 4,688

Five-year Trend Graph

     
1/1/20113.26313.2600000inches
2/1/20110.20280.2000000inches
3/1/20114.67314.6700000inches
4/1/20110.60270.6000000inches
5/1/20111.95311.9500000inches
6/1/20112.26272.2600000inches
7/1/201111.162911.1600000inches
8/1/20113.86173.8600000inches
9/1/20112.05222.0500000inches
10/1/20113.21253.2100000inches
11/1/20110.42260.4200000inches
12/1/20110.10280.1000000inches
1/1/20120.86260.8600000inches
2/1/20121.16271.1600000inches
3/1/20120.42230.4200000inches
4/1/20122.38212.3800000inches
5/1/20120.59290.5900000inches
6/1/201210.102810.1000000inches
7/1/20125.27315.2700000inches
8/1/20125.87315.8700000inches
9/1/20128.22308.2200000inches
10/1/20122.85282.8500000inches
11/1/20120.06270.0600000inches
12/1/20123.11313.1100000inches
1/1/20130.22300.2200000inches
2/1/20131.62231.6200000inches
3/1/20131.97281.9700000inches
4/1/20134.21294.2100000inches
5/1/20135.12315.1200000inches
6/1/201312.143012.1400000inches
7/1/201319.403119.4000000inches
8/1/201310.973110.9700000inches
9/1/20139.25309.2500000inches
10/1/20131.34311.3400000inches
11/1/20130.37300.3700000inches
12/1/20130.24310.2400000inches
1/1/20143.74293.7400000inches
2/1/20141.48271.4800000inches
3/1/20144.81314.8100000inches
4/1/20142.47292.4700000inches
5/1/20144.05314.0500000inches
6/1/20144.77304.7700000inches
7/1/20143.18313.1800000inches
8/1/20147.54287.5400000inches
9/1/20149.58269.5800000inches
10/1/20141.46291.4600000inches
11/1/20143.98303.9800000inches
12/1/20140.05310.0500000inches
1/1/20152.07312.0700000inches
2/1/20152.85282.8500000inches
3/1/20151.21311.2100000inches
4/1/20151.31301.3100000inches
5/1/20154.67314.6700000inches
6/1/20153.07303.0700000inches
7/1/20158.65318.6500000inches
8/1/20156.19316.1900000inches
9/1/20155.56305.5600000inches
10/1/20153.96313.9600000inches
11/1/20150.89300.8900000inches
12/1/20151.39311.3900000inches
Loading Chart...
Target
inches/yr
Threshold
inches/yr

Salinity

Units: PSS Year
2015
Historical
period of record
High 35.70 41.50
Mean 28.38 29.93 5.221
Low 15.50 3.20
No. of Samples 72 3,311

Five-year Trend Graph

     
1/1/201132.52632.5200000PSS
2/1/201131.341431.9300000PSS
3/1/201132.181432.0100000PSS
4/1/201132.08832.0300000PSS
5/1/201133.68632.3600000PSS
6/1/201134.05632.6400000PSS
7/1/201128.052331.9000000PSS
8/1/201129.041431.5100000PSS
9/1/201129.682831.1000000PSS
10/1/201130.12530.7700000PSS
11/1/201131.492230.4100000PSS
12/1/201132.17630.0900000PSS
1/1/201233.35630.9800000PSS
2/1/201233.45631.7100000PSS
3/1/201234.911232.5800000PSS
4/1/201236.111033.5800000PSS
5/1/201236.94534.4900000PSS
6/1/201234.42634.8600000PSS
7/1/201230.752034.4300000PSS
8/1/201230.10633.8700000PSS
9/1/201229.60632.9900000PSS
10/1/201226.90531.4500000PSS
11/1/201232.452230.7000000PSS
12/1/201232.83630.4400000PSS
1/1/201331.73630.6000000PSS
2/1/201333.08631.1000000PSS
3/1/201334.711431.9500000PSS
4/1/201332.06732.8100000PSS
5/1/201331.37632.6300000PSS
6/1/201331.75632.4500000PSS
7/1/201312.98529.3300000PSS
8/1/201321.40527.3800000PSS
9/1/201318.87624.7400000PSS
10/1/201315.06721.9100000PSS
11/1/201325.93721.0000000PSS
12/1/201331.07720.8900000PSS
1/1/201433.31724.2700000PSS
2/1/201426.09725.0600000PSS
3/1/201431.16727.1000000PSS
4/1/201430.11729.6100000PSS
5/1/201430.30730.3400000PSS
6/1/201432.51730.5800000PSS
7/1/201432.24730.4000000PSS
8/1/201429.76731.0100000PSS
9/1/201428.93630.6400000PSS
10/1/201419.55628.8800000PSS
11/1/201429.37628.7300000PSS
12/1/201429.03628.1500000PSS
1/1/201532.05628.1200000PSS
2/1/201529.77628.1200000PSS
3/1/201527.90627.9500000PSS
4/1/201531.90730.0000000PSS
5/1/201533.01730.6100000PSS
6/1/201531.35631.0000000PSS
7/1/201532.30531.0400000PSS
8/1/201519.17629.2700000PSS
9/1/201522.78628.4200000PSS
10/1/201522.50526.8500000PSS
11/1/201525.97625.6800000PSS
12/1/201530.20625.4900000PSS
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Turbidity

Units: NTU Year
2015
Historical
period of record
High 8.30 66.00
Mean 3.16 2.96 2.06868
Low 1.30 0.21
No. of Samples 86 2,799

Five-year Trend Graph

     
1/1/20111.4081.4000000NTU
2/1/20112.65122.0300000NTU
3/1/20112.71122.2500000NTU
4/1/20114.2192.7400000NTU
5/1/20113.8682.9700000NTU
6/1/20113.0982.9900000NTU
7/1/20112.53153.1800000NTU
8/1/20113.78123.3600000NTU
9/1/20112.47193.3200000NTU
10/1/20113.8673.2700000NTU
11/1/20111.88162.9400000NTU
12/1/20113.0672.9300000NTU
1/1/20123.1773.0400000NTU
2/1/20123.2882.9500000NTU
3/1/20125.87123.5200000NTU
4/1/20126.04103.8800000NTU
5/1/20125.2674.4500000NTU
6/1/20123.3484.4900000NTU
7/1/20125.0584.8100000NTU
8/1/20126.3885.3200000NTU
9/1/20125.1265.2000000NTU
10/1/20125.0075.0300000NTU
11/1/20124.0974.8300000NTU
12/1/20122.7984.7400000NTU
1/1/20133.7584.5200000NTU
2/1/20131.6983.7400000NTU
3/1/20132.3683.2800000NTU
4/1/20132.4082.8500000NTU
5/1/20132.2372.5400000NTU
6/1/20131.9482.4000000NTU
7/1/20134.2372.4800000NTU
8/1/20134.1772.8900000NTU
9/1/20134.6183.2600000NTU
10/1/20134.5983.6300000NTU
11/1/20134.2583.9700000NTU
12/1/20133.0684.1500000NTU
1/1/20142.4083.8500000NTU
2/1/20141.9883.4800000NTU
3/1/20142.5483.1400000NTU
4/1/20142.9482.8600000NTU
5/1/20142.6882.6000000NTU
6/1/20142.5182.5100000NTU
7/1/20143.9482.7700000NTU
8/1/20143.4083.0000000NTU
9/1/20144.7483.3700000NTU
10/1/20142.9683.3700000NTU
11/1/20143.1383.4500000NTU
12/1/20142.6373.4700000NTU
1/1/20153.9173.4600000NTU
2/1/20153.2883.4400000NTU
3/1/20152.9173.1400000NTU
4/1/20152.8683.1200000NTU
5/1/20152.8983.0800000NTU
6/1/20152.7483.1000000NTU
7/1/20152.8772.9300000NTU
8/1/20153.8973.0300000NTU
9/1/20153.1473.0700000NTU
10/1/20152.6563.0300000NTU
11/1/20154.2653.2600000NTU
12/1/20152.8063.2700000NTU
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Other Measures of Bay Health

In addition to nutrient levels and chlorophyll concentration, dissolved oxygen levels, and water clarity are also objective indicators of bay health. These have complex interactive cycles which are affected by rainfall, temperature, and tidal action, as well as other factors. High nutrient levels (nitrogen and phosphorus) can stimulate excessive growth of marine algae (indicated by chlorophyll a level), resulting in reduced water clarity (and increased light attenuation) and depleted oxygen levels. Both plants and animals in a bay need oxygen to survive, and the seagrasses which provide food and cover for bay creatures need light for photosynthesis.

Bay Contour Maps (2015)

Contour mapping is one of the best ways to visualize spatial differences in coastal water quality. The interactive map shown below presents monthly data for one selected water quality indicator atop an aerial view of the bay. Choose a different water quality parameter from the list at the top to change the map. Learn More about Water Quality Contour Mapping »

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Contour Visibility:

Visit the Water Quality Contour Mapping Tool to view and compare monthly water quality contour maps for ten different water quality indicators. In addition, you can generate your own custom maps.

Contour Legend:

  • Less than 1 mg/l
  • 1.0 - 5.9 mg/l
  • 6.0 - 10.9 mg/l
  • 11.0 - 17.9 mg/l
  • Greater than 18 mg/l

Seagrasses

Among the most important habitats in Florida's estuarine environments, seagrass beds are indispensable for the role they play in cycling nutrients, supplying food for wildlife, stabilizing sediments, and providing habitat for juvenile and adult finfish and shellfish. Use the interactive map below to observe the size, density and location of seagrass beds from year to year. The graph shows how the total amount of seagrass in the bay has changed over time. Learn More about Seagrasses »

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Target
1,010 acres

Land Use / Land Cover

Land use within a bay's watershed has a major effect on its water quality. In general, less development means better water quality. Land Cover/Land Use classifications categorize land in terms of its observed physical surface characteristics (upland or wetland, e.g.), and also reflect the types of activity that are taking place on it (agriculture, urban/built-up, utilities, etc.). Florida uses as its standard a set of statewide classifications which were developed by the Florida Department of Transportation. Learn More about Land Use and Land Cover »

Upper Lemon Bay is located within the Lemon Bay Watershed. The chart below shows the land use / land cover characteristics for Lemon Bay Watershed within the boundary of this Water Atlas. View details about the Lemon Bay Watershed »

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