WE are currnetly certified to perform coliform (bacteria) and nitrate testing on drinking water. Thise includes a presence abscence test for coliforms and E.coli, quantitative counts on coliforms and quantitative levels of nitrate nitrogen.

Colilert - Total Coliform:E.coli Presence/Absence

The Colilert test determines if there are any coliform bacteria or E.coli present in drinking water samples. This is the EPA and Washington State Depaterment of Health safe drinking water tolerance level. Water containing 1 or more coliform colony forming units per 100 mL results in a positive colilert is considered unsafe for human consumption.

Colilert results are available 24 hours after the test is started.

Colilert Sampling Instructions click here

Nitrate - Nitrate Electrode Method

The nitrate electrode responds to nitrate ion activity in water between 0.14 and 1400mg nitrate nitrogen per liter.

The Maximum Contaminat Level allowed by the Washington State Department of Health is 10mg/L and water containing greater than this is considered unsafe for human consumption. High risk individual such as infants and adults with depressed immune systems are recommended to drink only water below 5.0 mg/L nitrate nitrogen.

Nitrate analysis is complete in approximately 2 hours, depending on sample volume.

Nitrate Sampling Instruction click here