Page 251 - Freshwater-Biology-and-Ecology-Handbook

Table 5.13
SmartRivers threshold values for BMWP-score and ASPT
(Salmon & Trout Conservation website, 8 Sept 2021)

BMWP and ASPT scores/gradings:

QUALITY
ASPT BMWP
DESCRIPTION
≥6 ≥85 Excellent

5.0–5.9 70–84 Good
4.2–4.9 50–69 Fair

3.0–4.1 15–49 Poor

<3 <15 Seriously Polluted

Data generated by SmartRivers hubs are available on
an open-access database (https://salmon-trout.org/
smart-rivers-resources/) where it can be viewed on
maps or in a standard report that includes a few, mostly
family-level, biotic indices (Figure 5.9).

Figure 5.9
SmartRivers database with panel showing a summary biometric analysis (illustration from Salmon & Trout Conservation)

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