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Acceptable Limits

Wisconsin allows the reuse of wastewater on an individual basis. The water quality required is based on a specific use. For instance, if you want to flush toilets with collected graywayter or stormwater, the water quality would need to be: pH 6-9; < 10 mg/L BOD; < 5 mg/L TSS; no detectable fecal coliform cfu/100mL; and >1 mg/L and < 10mg/L chlorine residual (See attached file). Is this standard unreasonable for reusing stormwater?

Attachments:

Table 82.70.doc, 38 KB

Replies to This Discussion

Permalink Reply by Alvaro Mauricio Torres Ramirez on April 11, 2009 at 1:53pm

It depends of the use of the water, if it is for drinking water, this standards are not acceptable becasue of clorine, If clorine is less or equal to 3 mg/Lt at the end of the facility then this in some countries is ok, but iif t is higher, the clorine produces damages for human health and for nature, for example if you use water for irrigation the ideal clorine must be less than 1 mg/Lt beause it can produce a salty soil wich is not good in the long run it causes as I already say salinization and produce a deterioratio of the soil. The ideal pH should be between 6 and 7,5 which is almost neutral. BOD is OK, fecal coliform is also OK because by no reason any water to be reused should have traces of coliforms.

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