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. 2022 Oct 28;19(21):14080. doi: 10.3390/ijerph192114080

Table 3.

The range of water quality parameters for each membership functions (MF): not acceptable (NA), adequate (ADE) and highly acceptable (HACC) [63]. Reprinted with permission from Bhardwaj, J.; Gupta, K.K.; Gupta, R.; 2018.

Parameters NA ADE HACC NA
pH <5.7 5.3–6.7 6.5–8.7 >8.5
Dissolved oxygen <3 2.9–5.1 5.1–11.1 >11
Electrical conductivity <300 290–510 500–1050 >1000
Oxygen reduction potential <550 530–670 650–820 >800
Temperature <2 1.9–10 9–36 >35