WebSMURF: Observation Results

Observed data: Ammonia for river section 'Tipton to confluence of Wolverhampton and Olbury Arms, Bescot'

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	1.43	2.55	3.80	26	21.40	3.28	0.71
10/1990	1.13	1.83	3.47	32	5.20	2.08	0.63
10/1991	0.73	1.43	2.35	36	4.75	1.60	0.56
10/1992	0.47	0.77	1.83	33	2.09	0.99	0.07
10/1993	0.63	0.97	1.33	32	1.47	0.99	0.29
10/1994	0.16	1.02	1.90	36	2.44	1.08	0.03
10/1995	0.27	0.67	1.38	15	4.68	0.96	0.12
10/1996	0.17	0.51	1.76	13	2.53	0.75	0.04
10/1997	0.09	0.57	1.26	10	2.30	0.72	0.04
10/1998	0.33	0.63	1.14	12	2.41	0.77	0.10
10/1999	0.13	0.84	1.63	11	2.42	0.85	0.13
10/2000	0.19	0.80	2.33	12	3.75	1.19	0.15
10/2001	0.12	0.57	1.13	12	1.41	0.61	0.04
10/2002	0.32	0.52	0.52	3	0.53	0.44	0.28

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