WebSMURF: Observation Results

Observed data: Ammonia for river section 'Sandwell Valley Park to Pack Horse Bridge'

Graph of Ammonia - data tabulated below

The graph shows how ammonia data for this river section has changed over time.

Date of observation	centile10 (mgN/l)	centile50 (mgN/l)	centile90 (mgN/l)	count	max (mgN/l)	mean (mgN/l)	min (mgN/l)
10/1989	1.22	2.35	4.44	34	5.60	2.55	0.46
10/1990	0.58	1.98	5.76	48	10.90	2.80	0.13
10/1991	0.47	2.55	6.54	64	11.20	3.11	0.16
10/1992	0.50	1.40	4.79	53	5.48	2.01	0.17
10/1993	0.19	1.49	3.61	53	6.23	1.76	0.04
10/1994	0.25	1.18	2.63	47	3.83	1.31	0.09
10/1995	0.15	1.11	1.97	13	5.30	1.28	0.03
10/1996	0.12	0.47	2.24	11	3.68	1.08	0.04
10/1997	0.11	0.42	0.88	12	0.89	0.49	0.04
10/1998	0.15	0.51	1.17	13	1.36	0.56	0.10
10/1999	0.35	0.63	1.01	12	3.73	0.87	0.31
10/2000	0.17	0.50	1.22	12	1.35	0.62	0.13
10/2001	0.10	0.31	0.68	12	0.82	0.35	0.06
10/2002	0.28	0.38	0.39	3	0.39	0.34	0.26

The table shows how ammonia data for this river section has changed over time.