Biological Monitoring Using Macroinvertebrates as Bioindicators of Water Quality of Maroaga Stream in the Maroaga Cave System, Presidente Figueiredo, Amazon, Brazil

Table 1

BMWP classes, scores, categories, and result interpretation (adapted from Armitage et al., 1983 [30], and Alba-Tercedor, 1996 [29]).

Class	BWMP score	Category	Interpretation
I	>150	Good	Very clean water
	101–150		Clean or not significantly altered
II	61–100	Acceptable	Clean but slightly impacted
III	36–60	Questionable	Moderately impacted
IV	15–35	Critical	Polluted or impacted
V	<15	Very critical	Heavily polluted