Tests Performed

Laboratory Test on Wastewater


The wastewater chemist performs tests on the treated wastewater and keeps records that are reported to the government monthly. These records are required to keep the plant in compliance with its National Pollutant Discharge Elimination System (NPDES) permit.

Tests performed include:
  • Ammonia
  • Carbonaceous Biochemical Oxygen Demand (CBOD)
  • Chlorine (which is added to the wastewater in the treatment process)
  • Fecal Coliforms (bacterial testing)
  • Nitrates
  • pH
  • Total suspended solids

Other samples are collected at the plant, then sent to other labs for completion.

These tests include:
  • Cyanide
  • Metals
  • Microbiological test on biosolids
  • WET (test for toxicity to aquatic life)

The wastewater chemists also work with the Pretreatment Program to sample and test for metals and organics, such as pesticides and industrial chemicals.

Discharge Monitoring Report Quality Assurance


The tests are performed using EPA-approved methodology. The lab personnel are tested once a year through Discharge Monitoring Report Quality Assurance (DMRQA). The DMRQA is a blind sample test given to make sure the chemist is using correct methods and is proficient in perming the tests.