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Water quality category
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Range of conductivity average (µScm−1)
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Number of conductivity fluctuation events (|κt—κt − 1|> 5 µScm−1)
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Description
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|---|
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WQC0
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0–25
|
And
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= 0
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Normal river water, main stem
|
|
WQC1
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26–40
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And
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< 4
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Stabilized river water during Al treatment
|
|
WQC2
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0–25
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And
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> 0
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River water with groundwater influence, or other atypical variations in conductivity, or brackish water (estuary)
|
| |
Or
| |
|
26–40
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And
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≥ 4
|
| |
Or
| |
|
> 40
|
And
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Any
|
- WQCs are based on certain combinations of average conductivity and the variation between consecutive conductivity measurements, or fluctuation events, over a 3-h interval containing a total of 180 measurements. A fluctuation event was defined to happen when conductivity changed by more than 5 µScm−1 in 60 s
