Parameter

1992

1993

1994

1995

1996

1997

1998

1999

2000

2001

2002

2003

2004

pH

7.63

7.40

7.47

7.48

7.85

7.62

7.30

7.72

7.96

7.83

7.83

7.79

7.81

Alkalinity (mg/l as CaCO3)

51.0

48.0

43.0

44.0

40.0

43.0

44.0

44.0

46.3

43.3

44.1

45.2

46.2

Total Phosphorus (mg/l)

0.042

0.048

0.045

0.043

0.039

0.040

0.036

0.033

0.034

0.034

0.034

0.034

0.039

Ortho Phosphorus (mg/l)

<0.005

<0.005

<0.005

<0.005

<0.005

<0.005

<0.005

<0.005

<0.004

<0.004

<0.004

<0.004

0.003

Total Nitrogen (mg/l)

0.85

0.86

0.82

0.80

0.76

0.75

0.70

0.76

0.78

0.78

0.75

0.82

0.82

Ammonia (mg/l)

<0.03

<0.03

<0.03

<0.03

<0.03

<0.03

<0.03

<0.03

<0.03

<0.02

<0.02

<0.02

0.03

Nitrate Nitrogen (mg/l)

<0.02

<0.02

<0.02

<0.02

<0.02

<0.02

<0.02

<0.02

<0.02

<0.02

<0.02

<0.02

0.01

Nitrite Nitrogen (mg/l)

<0.020

<0.020

<0.005

<0.005

<0.005

<0.005

<0.005

<0.005

<0.005

<0.005

<0.005

<0.005

0.003

Total Kjeldahal Nitrogen (mg/l)

0.84

0.82

0.78

0.76

0.74

0.74

0.60

0.74

0.76

0.77

0.79

0.80

0.76

Total Suspended Solids (mg/l)

6.0

6.0

7.0

6.5

6.5

6.0

5.0

5.5

5.0

4.5

3.5

4.0

4.8

Volatile Suspended Solids (mg/l)

5.0

5.0

6.0

6.0

5.0

4.0

4.0

5.0

4.5

4.0

3.8

4.0

4.6

Total Dissolved Solids (mg/l)

126

124

117

116

116

108

112

126

132

128

128

124

120

Chlorophyll-a (mg/m³)

14.2

21.0

17.0

18.4

17.0

18.0

17.3

16.8

14.8

14.6

11.4

11.1

10.9

Conductivity (umhos @ 25°C)

202

198

195

182

177

177

170

177

182

192

196

184

193

Secchi Depth (m)

1.0

1.1

1.1

1.1

1.1

1.1

1.1

1.1

1.1

1.0

1.0

1.2

1.2