Frequency of each FreshWater Watch result band across all samples in the Greener Canalside dataset.
All nitrate test bands are shown, including bands with no samples. Low, Moderate and High describe nutrient concentration using Canal Watch display groupings, not official ecological-status classifications. The vertical scale shows the number of samples.
All phosphate test bands are shown, including bands with no samples. Low, Moderate and High describe nutrient concentrations using the FreshWater Watch reference chart; they are not official ecological-status classifications. The vertical scale shows the number of samples.
Number and percentage of samples across the full FreshWater Watch turbidity scale. The left-hand scale shows the number of samples; colours follow the existing turbidity assessment scale.
Recorded water temperature results over time.
Recorded pH results over time. Result colours follow the supplied pH 4–10 test-kit colour card, with each reading identified as acidic, neutral or alkaline; the water-quality assessment is shown separately.
Total coliform colony results per 100 mL. Test-kit colour indicates a positive or negative result; the separate detection indicator is not an official bathing-water classification.
Recorded BOD results over time.
Recorded dissolved oxygen results over time. Result colours follow the supplied 0, 4 and 8 ppm test-kit colour card; percent saturation is calculated from the supplied temperature/oxygen table.
For All sites, the latest survey at each location is shown. Select one site to see its complete survey history. Weather is the closest archived Met Office observation within 90 minutes.
Each point represents the recorded result for that survey date at the selected site. Nitrate and phosphate are plotted using the midpoint of the FreshWater Watch result range. Turbidity is plotted in NTU using the recorded test value.
This chart shows the number of people recorded as taking part on each survey date. Select an individual site or choose All sites to compare participation between monitoring locations.
Separate event register for pollution incidents, suspected pollution and environmental events observed along the canal.
Add one incident manually or batch-import the standard Canal Watch incident CSV. Records are validated before they are sent to Supabase.
Download the template, add one incident per row, then choose the completed CSV file below.