Samples were analyzed for chemical oxygen demand (COD)
carbonaceous biochemical oxygen demand (cBOD5)
total ammonia nitrogen (TAN)
nitrite–nitrogen (NO2–N)
nitrate–nitrogen (NO3–N)
total nitrogen (TN)
alkalinity, pH, sulfate (SO42−)
sulfide (S2−)
total suspended solids (TSS)
total phosphorus (TP)
and dissolved reactive phosphorus (DRP) using methods from APHA (2005) and
Hach Company (2003)