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Community Clean Water Institute Water Alert

Dutch Bill Creek 030

 

5/25/09 

Site ID

Time

Air TempCelsius

pH

Water TempCelsius

Dissolved Oxygen mg/l

Turbidity

NTU

Conductivity

Microsiemens/cm

DBC030

12:30

20

9.0

15.5C

8.1 mg/l

6.28

490


Basin Plan Objective of North Coast Area: pH of freshwater should be within 6.5 and 8.5 to protect most organisms.

 

Date

pH

1/2/09

7.5

2/16/09

6.9

2/22/09

7.4

3/1/09

8.5

3/15/09

8.3

4/19/09

8.2

5/25/09

9.0

 

Here are some causes of increased pH

 

¨                   Excess nutrients cause algae growth, increasing pH. 

¨                   Bedrock and surrounding rock material Limestone (calcium carbonate) naturally raises the pH.

¨                   Decreased water temperature.

 

Effects

¨                   Most aquatic life only survive within a narrow pH range

¨                   May alter other substances to higher toxicity.