Table 6. Summary of water-quality indicators showing improvement or deterioration at the Miami and Tamiami Canal stations over time [Based on trends determined at a p-value of 0.10]
Water-quality constituent	Time period	Trend	Effect on water quality
Miami Canal Station
Chloride	1966-94	Upward	Deterioration
Magnesium	1966-94	Upward	Deterioration
Potassium	1966-94	Upward	Deterioration
Silica	1966-94	Upward	Deterioration
Sodium	1966-94	Upward	Deterioration
Sulfate	1966-94	Upward	Deterioration
Turbidity	1970-78	Downward	Improvement
Specific conductance	1966-94	Upward	Deterioration
Dissolved Solids	1966-94	Upward	Deterioration
	1976-94	Upward	Deterioration
	1987-94	Upward	Deterioration
pH	1966-94	Downward	Deterioration
Suspended sediment	1974-94	Upward	Deterioration
	1987-94	Downward	Improvement
Total ammonia	1971-94	Downward	Improvement
Total organic carbon	1970-81	Upward	Deterioration
Total phosphorus	1987-94	Downward	Improvement
Barium	1978-94	Downward	Improvement
Iron	1969-94	Downward	Improvement
Fecal coliform	1976-94	Downward	Improvement
Fecal streptococcus	1987-94	Upward	Deterioration
Tamiami Canal Station
Chloride	1967-93	Upward	Deterioration
Fluoride	1967-93	Downward	Improvement
Magnesium	1967-93	Upward	Deterioration
Potassium	1967-93	Upward	Deterioration
Sodium	1967-93	Upward	Deterioration
Specific conductance	1967-93	Upward	Deterioration
Dissolved solids	1967-93	Upward	Deterioration
Dissolved oxygen	1967-93	Downward	Deterioration
Suspended sediment	1976-93	Upward	Deterioration
Total ammonia	1970-92	Downward	Improvement
Total nitrite plus nitrate	1975-85	Downward	Improvement
Barium	1978-93	Downward	Improvement
Strontium	1967-93	Upward	Deterioration

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