Observed data: Biochemical Oxygen Demand (BOD) for river section 'Pack Horse Bridge, Perry Barr to confluence with River Rea'
Graph of Biochemical Oxygen Demand (BOD)
What's on the graph?
The graph shows how biochemical oxygen demand (bod) data for this river section has changed over time.
Table of Biochemical Oxygen Demand (BOD)
| Date of observation | centile10 (mg/l) | centile50 (mg/l) | centile90 (mg/l) | count | max (mg/l) | mean (mg/l) | min (mg/l) |
|---|---|---|---|---|---|---|---|
| 10/1989 | 3.85 | 7.25 | 15.75 | 10 | 27.00 | 9.15 | 2.50 |
| 10/1990 | 3.15 | 7.25 | 14.05 | 12 | 19.00 | 7.96 | 3.00 |
| 10/1991 | 3.50 | 4.00 | 6.00 | 11 | 6.00 | 4.45 | 3.00 |
| 10/1992 | 4.00 | 6.00 | 8.50 | 11 | 47.00 | 9.41 | 4.00 |
| 10/1993 | 2.50 | 3.50 | 10.00 | 11 | 11.50 | 4.86 | 2.50 |
| 10/1994 | 2.50 | 4.00 | 6.50 | 22 | 12.00 | 4.52 | 2.00 |
| 10/1995 | 2.55 | 5.75 | 8.45 | 12 | 15.00 | 5.96 | 2.00 |
| 10/1996 | 2.00 | 2.50 | 13.50 | 12 | 15.00 | 5.54 | 2.00 |
| 10/1997 | 2.95 | 3.50 | 6.85 | 10 | 14.50 | 4.95 | 2.50 |
| 10/1998 | 2.00 | 3.50 | 7.50 | 11 | 16.00 | 4.82 | 2.00 |
| 10/1999 | 2.21 | 4.67 | 12.32 | 12 | 15.10 | 6.03 | 1.62 |
| 10/2000 | 2.33 | 2.94 | 6.54 | 12 | 11.70 | 3.93 | 2.20 |
| 10/2001 | 2.38 | 4.08 | 7.12 | 12 | 7.49 | 4.52 | 2.16 |
| 10/2002 | 2.34 | 3.58 | 3.76 | 3 | 3.80 | 3.14 | 2.03 |
What's in the table?
The table shows how biochemical oxygen demand (bod) data for this river section has changed over time.
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