WebSMURF: Observation Results

Observed data: Ammonia for river section 'River Rea to Water Orton 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	0.27	0.80	2.62	30	3.90	1.25	0.09
10/1990	0.26	0.85	3.60	42	7.90	1.56	0.18
10/1991	0.26	1.25	3.91	54	7.40	1.70	0.09
10/1992	0.22	0.77	2.96	51	5.28	1.37	0.08
10/1993	0.17	0.82	2.47	53	3.69	1.17	0.04
10/1994	0.07	0.36	1.76	58	3.54	0.71	0.03
10/1995	0.14	0.27	1.19	17	3.44	0.59	0.04
10/1996	0.05	0.19	1.42	11	2.71	0.60	0.05
10/1997	0.09	0.23	0.48	12	0.60	0.26	0.07
10/1998	0.11	0.25	0.82	12	1.15	0.38	0.09
10/1999	0.15	0.34	0.61	12	1.20	0.42	0.11
10/2000	0.13	0.38	0.74	12	2.05	0.50	0.12
10/2001	0.10	0.20	0.31	12	0.31	0.19	0.05
10/2002	0.52	1.27	3.14	3	3.61	1.74	0.34

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