Table 2. Environmental status using average ecological score of bentic macroinvertebrate community

등급	저서동물 평균생태점수(AESB)	환경상태
A	3.7 ≤ AESB	매우 좋음
B	3.1 ≤ AESB < 3.7	좋음
C	2.6 ≤ AESB < 3.1	보통
D	2.1 ≤ AESB < 2.6	나쁨
E	0 ～ AESB < 2.1	매우 나쁨