Modified mTEC Agar is a selective culture medium used for the chromogenic detection and enumeration of thermotolerant Escherichia coli in water by the membrane filtration technique.

• Peptone is a source of nitrogen, amino acids, and carbon
• Agar is the solidifying agent

Sodium lauryl sulfate and sodium desoxycholate are selective against Gram-positive bacteria. Red to magenta colonies may be presumptively identified as
E. coli.