Dry

Season

2022

Wet

Season

2023

Sample Location

Distance

km (miles)

pH

Temp (˚C)

Salinity (‰)

DO (ppm)

pH

Temp (˚C)

Salinity (‰)

DO (ppm)

Upstream

0

7.07

21.7

1.1

ND

6.95

8.9

0.87

2.58

Tillman WWTP

5.07 (3.2)

6.54

24.5

0.5

ND

6.65

16.4

0.46

4.68

Sepulveda Basin

6.25 (3.9)

5.72

22.6

0.5

ND

6.58

11

0.7

4.66

Glendale Narrows

35.77 (22.2)

6.7

24.8

0.5

ND

7.05

15.2

0.6

3.25

Arroyo Seco Confluence

44.52 (27.7)

8.1

23.7

0.4

ND

8.74

15.2

0.41

1.4

Average

6.83

23.46

0.6

7.19

13.34

0.608

3.314

STDEV

0.87

1.3

0.28

0.89

3.22

0.19

1.4

MIN

5.72

21.7

0.4

6.58

8.9

0.41

1.4

MEDIAN

6.7

23.7

0.5

6.95

15.2

0.6

3.25

MAX

8.1

24.8

1.1

8.74

16.4

0.87

4.68