Latest Beverley Brook Water Quality Results

We started performing regular water quality testing for E. coli on the Beverley Brook at Barnes Green with the help of our citizen science volunteer group in autumn 2025.

You can read about what is affecting the quality of the water in the brook here. The main water source of Beverley Brook is treated water from the Hogsmill sewage treatment plant. In addition to this, misconnected domestic sewage pipes, periodical sewage discharges, surface water runoff and insecticides washed into the brook from dogs all contribute pollutants to the river.

The latest test results will be added to the table below.

DateE. coli cfu/100ml
03/02/20251427
25/01/2025898
13/01/20251427
11/01/20263095
18/11/20251222
12/11/20256703
6/11/2025898
3/11/20251,945
26/10/202520,000
22/10/20256,703
20/10/202515,000
16/10/20257,829
9/10/202517,000
1/10/20251,945
26/9/202568,000*
23/9/20252,650
22/9/20251,667

 

Water quality standards for inland bathing waters

ExcellentEC: ≤500 cfu/100ml (95th percentile)
GoodEC: ≤1000 cfu/100ml (95th percentile)
SufficientEC: ≤900 cfu/100ml (90th percentile)
PoorSufficient standard not met

In the UK, concentrations of faecal indicator organisms Escherichia coli (EC) and Intestinal enterococci (IE) are used to classify a bathing water. The classifications are based on the analysis of samples taken over a four year period. The classification uses the 95th percentile for the Good and Excellent class standards, and the less strict 90th percentile for Sufficient. If a bathing water does not meet the standard for Sufficient, it is classified as Poor.

*There was a pollution event originating upstream of Barnes Green. This sample was taken from the brook at Palewell.

Published on: 15 October 2025 

Last edited on: 9 February 2026

Latest Beverley Brook Water Quality Results

We started performing regular water quality testing for E. coli on the Beverley Brook at Barnes Green with the help of our citizen science volunteer group in autumn 2025.

You can read about what is affecting the quality of the water in the brook here. The main water source of Beverley Brook is treated water from the Hogsmill sewage treatment plant. In addition to this, misconnected domestic sewage pipes, periodical sewage discharges, surface water runoff and insecticides washed into the brook from dogs all contribute pollutants to the river.

The latest test results will be added to the table below.

DateE. coli cfu/100ml
03/02/20251427
25/01/2025898
13/01/20251427
11/01/20263095
18/11/20251222
12/11/20256703
6/11/2025898
3/11/20251,945
26/10/202520,000
22/10/20256,703
20/10/202515,000
16/10/20257,829
9/10/202517,000
1/10/20251,945
26/9/202568,000*
23/9/20252,650
22/9/20251,667

 

Water quality standards for inland bathing waters

ExcellentEC: ≤500 cfu/100ml (95th percentile)
GoodEC: ≤1000 cfu/100ml (95th percentile)
SufficientEC: ≤900 cfu/100ml (90th percentile)
PoorSufficient standard not met

In the UK, concentrations of faecal indicator organisms Escherichia coli (EC) and Intestinal enterococci (IE) are used to classify a bathing water. The classifications are based on the analysis of samples taken over a four year period. The classification uses the 95th percentile for the Good and Excellent class standards, and the less strict 90th percentile for Sufficient. If a bathing water does not meet the standard for Sufficient, it is classified as Poor.

*There was a pollution event originating upstream of Barnes Green. This sample was taken from the brook at Palewell.

Published on: 15 October 2025 

Last edited on: 9 February 2026