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>>PO43−

PO43−  is like the phosphate detergents can cause fish and other aquatic organisms anoxia. When animals or plants from the nature decompose, detergent that contain phosphorus and chemical fertilizer dispose into the river, it caused PO43− pollution. It cause eutrophication and therefore a large number of microalgae grown if there’s too much PO43− 

PO43− Testing Result of Plum Tree Creek

Observation Point

1

2

3

4

5

6

7

8

9

10

11

12

13

Low Flow

0

0.02

0.1

0.1

0.1

0.1

0.02

0.2

0.2

1

2

2

2

High Flow

0

0

0.02

0.1

0.1

0.02

0.02

0.1

0.2

0.5

2

2

2

PO43− Statistical Chart of Plum Tree Creek

Analysis：

Origin-pollution free

Headstream-mild pollution

Midstream- mild polluted

Downstream-serious polluted

There were not much differences between high and low flow.

PO43− were mainly from the chemical fertilizers and domestic sewage. Especially serious at the downstream.

Reference：PO43−  Wikipedia. http://zh.wikipedia.org/wiki/
　
Hardly any PO43− in origin
Higher PO43− in downstream
Testing
Observing carefully