Water Quality Star Rating

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WATER QUALITY STAR RATING

No-Star Wastewater

Domestic sewage and trade waste. Should not be discharged or used without treatment.

One-Star Effluent

Screened to remove large particles. Should not be discharged or used without further treatment.

Two-Star Effluent

Biodegradable organic material reduced. Usually disinfected. May be discharged into some waterways or applied to land in controlled conditions.

Three-Star Effluent

Nearly all biodegradable organic material removed and nutrient content reduced (either nitrogen or both nitrogen and phosphorus). Usually disinfected. May be discharged to sensitive waterways or land with approval of the regulating authority.