Orthophosphate Trend Analysis

Spring	No. of Samples	Period	Mann- Kendall p-Statistic	Sen’s Slope (mg/L per year)	Mann-Kendall Trend
Alexander Springs	77	1972–2010	0.46225	-1.70E-04	stable
Apopka Spring	83	1986–2010	0.87113	5.33E-05	stable
Beecher Springs	12	1985–2001	0.71052	-3.60E-04	stable
Blue Spring (Lake)	10	1996–2002	0.25966	-7.50E-04	stable
Blue Spring (Volusia)	58	1972–2010	0.00022	-5.20E-04	decreasing – insignificant
Bugg Spring	43	1972–2010	0.08647	1.42E-03	increasing – insignificant
Croaker Hole Spring	24	1995–2010	0.83394	3.99E-04	stable
Double Run Spring	13	1998–2004	0.54801	5.00E-04	stable
Fern Hammock Springs	60	1994–2010	0.05790	-2.00E-04	decreasing – insignificant
Gemini Springs	53	1995–2010	0.26035	7.82E-04	stable
Green Springs	45	1996–2010	0.66933	1.74E-04	stable
Green Cove Spring	7	2001–2008	0.70711	-1.48E-03	stable
Holiday Springs	8	1996–2001	0.80650	-2.30E-04	stable
Island Spring	22	2001–2010	0.13313	1.81E-03	stable
Juniper Springs	73	1994–2010	0.03566	-3.30E-04	decreasing – insignificant
Miami Springs	51	1995–2010	0.39231	-1.51E-03	stable
Orange Spring	40	2000–2010	0.21291	1.72E-03	stable
Palm Springs (Seminole)	53	1972–2010	0.10312	-7.40E-04	stable
Ponce de Leon Springs	62	1972–2010	0.65046	-1.60E-04	stable
Rock Springs	73	1994–2010	0.48301	-3.00E-04	stable
Salt Springs	40	1994–2010	0.17403	3.28E-04	stable
Sanlando Springs	55	1972–2010	0.52887	3.00E-04	stable
Silver Springs	56	1967–2005	0.27872	-5.93E-05	stable
Silver Glen Springs	64	1972–2010	0.09309	1.67E-04	increasing – insignificant
Starbuck Spring	56	1972–2010	0.54449	-2.90E-04	stable
Sweetwater Springs	62	1994–2010	0.43383	-2.10E-04	stable
Wekiwa Springs	80	1972–2010	0.64904	1.60E-04	stable