Good News 

WildFish SmartRivers Biannual Ecology Data

The PBA currently have one SmartRivers survey site at our Balksbury Park monitoring site. A 3 minute kick-sample is placed in alcohol and sent away to a lab for detailed analysis of everything not just the 8 species PBA volunteers count every month.

WildFish have recently published 2 reports:

• 1. a Watercress & Winterbournes Test Catchment specific Autumn 2023 Report
     with helpful explanatory notes here
     Balksbury Park has the highest species diversity in the W&W Test Catchment

  2. an overall SmartRivers 2023 Report plus Biometric Glossary that you may find helpful
     Balksbury Park is one of the top 3 rivers for species abundance and diversity

Angling Trust Water Quality Data

Water Quality Monitoring Network 3rd Annual Report

Has a dedicated chalk stream section featuring the amazing work of our colleagues at the Upper Itchen Restoration CIC . Their report on Nutrient Monitoring on the Test, Itchen and Meon includes data from our 9 PBA water quality monitoring sites along the Pillhill Brook.

Riverfly Partnership Data

2025 Riverfly Summary Report

The Riverfly Partnership produces annual and monthly reports summarising the data collected by their monitors nationwide. The PBA contributed 63 invertebrate kick-sampling surveys in 2025. 

Samples are given RMI scores (see below).

all indicating a healthy brook