Including filter system and high-performance Coliform Bacteria filter.
Coliform bacteria are a group of microorganisms commonly used to indicate how sanitary your water is. If a lab test flags coliform bacteria, it can mean that untreated water is entering the plumbing system through a damaged well, a cross-connection, or another intrusion point. Often there’s no change in taste or smell, so test results are the only clue; you may also see the phrase total coliforms on your report to describe the wider group.
Around Delta, homeowners who find total coliforms in testing usually respond with confirmatory sampling, fixes to possible entry points, and installation of a whole-house barrier to protect every tap. Total coliforms are not identical to E. coli but can indicate conditions that allow other microbes to appear. Because levels can fluctuate, treating water at the point of entry is a common choice so showers, sinks and appliances all receive the same protection.
For addressing coliform bacteria, the single most effective whole-house option is a point-of-entry UV disinfection system. UV exposes microorganisms to ultraviolet light as water flows through the chamber, inactivating them without chemicals and covering the entire home. This method directly targets bacteria rather than relying on taste-and-odor media, and when the unit is sized for your home’s flow it provides consistent treatment at every faucet.
UV works best with relatively clear water because high sediment can block the light; that’s why a prefilter is often paired with UV. If you’re selecting a single technology specifically for total coliforms, UV is the practical workhorse. Mr. Pure Water in Delta can help size and install the right UV unit for your plumbing and peak demand, and with regular lamp and sleeve maintenance it delivers reliable whole-house protection against coliform bacteria.