Coliforms and E.coli
Eurofins offers presence/absence testing of total coliforms and E.coli, which can indicate foecal contamination following sewage ingress in a building or in a water source.
For an additional fee, samples can be quantitated 
using a Most Probable Number or MPN method. This testing is sensitive down to 1MPN/100ml and is backed by standard Method 9221 as a compliance monitoring method in drinking water.
The testing takes only 24hrs for a result, and can be performed from various samples types such as sterile surface swabs, bulk samples (e.g. dirt) and water samples.