#5 MEASURING THE HEALTH OF OUR FRESH WATERS

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Title of Water: Ellery Lake in Yosemite National Park

Type of Water: __ stream __river _x_lake

Description of lake: alpine lake, lush meadows, snowfields nearby, small lake

Nearest Town, City: State: Lee Vining, California

Date: Time of Day: 12:00 pm

Temperature: 10 deg C

Ph: 7.91

Dissolved Oxygen: ll.95

TDS: 19.14

Current Speed:NA

Who to contact in the area with the data results and concerns:

Factor

Measured at

Q Score

Times the Q value

Final Quotient

Dissolved Oxygen

11.95 or 133% sat

84

.38

31.9

PH

7.91

86

.24

20.6

TDS (conductivity)

19.14

84

.16

13.4

Temperature

10 C

45

.22

9.9

The final Water Qualitiy Index was 75.8 which is a top score in the nation. Strong points at Ellery Lake were the amount of available oxygen for life and the PH score.