WebSMURF: Observation Results

Observed data: Ammonia for river section 'Union Road to Eagle Lane, Tipton'

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	2.54	4.70	20.28	7	39.00	9.53	2.00
10/1990	1.83	3.25	5.36	10	5.90	3.51	1.81
10/1991	0.69	1.61	2.68	13	3.00	1.59	0.40
10/1992	0.34	0.92	1.23	10	1.85	0.87	0.28
10/1993	0.64	1.61	1.94	11	2.04	1.42	0.62
10/1994	0.92	1.41	2.39	12	3.11	1.62	0.72
10/1995	0.70	1.38	3.18	13	5.60	1.97	0.51
10/1996	0.57	0.87	1.95	12	3.71	1.15	0.07
10/1997	0.57	0.76	1.35	10	3.79	1.07	0.52
10/1998	0.42	0.78	1.83	12	3.29	1.06	0.26
10/1999	0.54	1.25	2.37	11	2.44	1.39	0.50
10/2000	0.43	1.42	4.01	11	6.24	2.17	0.43
10/2001	0.23	0.67	1.04	11	1.21	0.63	0.21
10/2002	0.44	0.64	0.76	3	0.79	0.61	0.39

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