Coliform Basics
This type of coliform bacteria is used as an indicator of environmental contamination.
Coliform Bacteria (total)
Coliform samples should be taken from representative sites, but never from this type of location.
dead ends, outside taps
This is the most commonly used disinfectant in drinking water systems.
Chlorine
This type of maintenance is performed before deterioration occurs.
Preventative
This term describes any physical connection that could allow contamination into a potable water system.
cross-connection
This specific bacteria indicates fecal contamination and has its own MCL.
Escherichia Coli
If a routine sample is total coliform–positive, repeat samples must be collected within this time frame.
24 Hours
This disinfection method provides no residual in the distribution system.
UV
Overflow pipes should end within this distance of the ground.
1 foot
This type of backflow occurs when system pressure drops and creates a siphon.
backsiphonage
A standard coliform sample bottle must hold this exact volume of water.
100 milliliters?
In case of a positive total coliform sample, one repeat sample must always be collected from this location.
original routine sample site
This disinfectant is formed when chlorine reacts with ammonia.
Chloramines
This tank component prevents vacuum conditions and must be screened to keep animals out.
Air vent
This backflow condition occurs when pressure on the customer side exceeds system pressure.
backpressure
Coliform sample results are reported by laboratories using these two possible outcomes.
present or absent?
Triggered Source Water Monitoring applies when a positive TCR sample occurs in this type of system.
groundwater system
This powerful disinfectant must be generated on-site and leaves no detectable residual.
Ozone
This corrosion protection method uses sacrificial anodes to protect steel tanks.
Cathodic Protection
This type of backflow prevention method provides a physical separation and is not testable.
air-gap
The original Total Coliform Rule was approved by Congress and enacted in this year.
1992
Coliform sampling results must be stored by the water system for at least this many years.
5 Years
This chlorine product is a greenish-yellow gas and is 2.5 times heavier than air.
Chlorine Gas
According to EPA guidance, the typical life expectancy of a water storage tank falls within this range.
30-60 Years
Backflow assemblies must be inspected and tested by individuals with this qualification.
certified cross-connection control testers