Visit April 30, 3-4:30 p.m. Cloudy.

Recent heavy rain previous day, dry underfoot.

Samples collected

  1. Between bank & centre weeds in main pond (open water)
  2. Adjacent to weir in main pond within new typha angustifolia
  3. Downstream from pond, above first "weir"
  4. Hedge pond - this was surprisingly at a much lower level than the previous visit - after a dry spell.

 

 

1

2

3

4

5

PH

7.7

7.6

7.0

7.7

 

Nitrates

Neg

 

 

Neg

 

Nitrites

neg

 

 

Neg

 

Clarity

Clear

Very clear

Clear/green algae

Muddy

 

Mayfly

Not found

Not found

Not found

Not found

 

Shrimp

 

 

 

No

 

Water louse

 

 

 

No

 

Blood worm

 

 

 

 

 

Gnat/mosquito

 

 

 

Yes

 

Rat-tailed maggot

 

 

 

No

 

 

 

 

 

 

 

Fe (Iron)

2

 

>2

5-10

 

Dissolved Oxygen

4 mg/l

 

 

 

 

 

Little life

Abundant daphnia

Little life

Abundant life

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Water quality

 2-3

2-3

2-3

3

 

Water quality is rated [4] (clean) [3] slight pollution [2] bad pollution [1] (severe pollution) [0] contaminated.