Total Dissolved Solids Trend Analysis

Spring	No. of Samples	Period	Mann- Kendall p-Statistic	Sen’s Slope (mg/L per year)	Mann-Kendall Trend
Alexander Springs	112	1967–2010	0.11936	0.990	stable
Apopka Spring	115	1972–2010	1.000	-0.008	stable
Beecher Springs	11	1972–2001	0.25145	-1.067	stable
Blue Spring (Lake)	17	1967–2004	0.16113	1.000	stable
Blue Spring (Volusia)	95	1960–2010	0.70606	-0.591	stable
Bugg Spring	46	1967–2010	7.56E-05	1.969	increasing – insignificant
Croaker Hole Spring	30	1981–2010	0.35020	-4.286	stable
Double Run Spring	18	1997–2005	0.00250	-5.167	decreasing
Fern Hammock Springs	93	1972–2010	0.78634	-0.064	stable
Gemini Springs	54	1993–2010	0.18707	-5.000	stable
Green Springs	43	1972–2010	0.82667	5.833	stable
Green Cove Spring	42	1957–2010	0.04875	-0.464	decreasing – insignificant
Holiday Springs	15	1967–2004	0.00488	1.764	increasing – insignificant
Island Spring	28	1982–2010	0.75445	27.602	stable
Juniper Springs	116	1962–2010	0.28464	-0.103	stable
Miami Springs	56	1972–2010	0.01242	1.091	increasing – insignificant
Orange Spring	39	1972–2010	0.50216	-0.364	stable
Palm Springs (Seminole)	57	1960–2010	0.00708	1.427	increasing – insignificant
Ponce de Leon Springs	105	1960–2010	0.00243	3.973	increasing – insignificant
Rock Springs	129	1960–2010	0.00193	0.315	increasing – insignificant
Salt Springs	100	1956–2010	0.23730	11.063	stable
Sanlando Springs	57	1972–2010	6.59E-05	1.505	increasing – insignificant
Silver Springs	79	1960–2010	0.32120	0.166	stable
Silver Glen Springs	91	1981–2010	0.00820	-4.583	decreasing – insignificant
Starbuck Spring	57	1960–2010	8.65E-05	1.471	increasing – insignificant
Sweetwater Springs	76	1980–2010	1.28E-05	-16.786	decreasing
Wadesboro Spring	6	1960–2002	0.06029	1.881	increasing – insignificant
Wekiwa Springs	130	1959–2010	3.80E-11	1.218	increasing – insignificant