Ultraviolet Water Sterilizers in Maryland

Providing UV Water Filtration Throughout Annapolis, Glenwood & More!


An ultraviolet light sterilizer is a water filtration process for your home. The system uses UV light to kill bacteria and microorganisms in your drinking water. Because there are no chemicals involved in the process, it’s a safe and effective option for filtering your home’s drinking water. Compared to other solutions, UV water filtration systems are fast, effective and require a minimal amount of maintenance. They can be used in conjunction with other technologies, such sediment filters and reverse osmosis, to provide superior quality drinking water for your home.

Since 1979, our family-owned water filtration company has been cleaning and sterilizing the water in homes and businesses throughout Howard, Anne Arundel, Montgomery, and Baltimore counties. Our team of experts can find the right solution for you!

Are you ready to make the switch over to filtered water with an ultraviolet water sterilizer? Contact Water Doctor today or keep reading to learn more about the benefits of a UV water filtering system!

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How UV Water Treatment Works

An ultra violet sterilization system employs ultraviolet light as a means to  kill harmful microorganisms like bacteria and viruses, without affecting the taste of the water or adding objectionable odors. As water flows through the ultraviolet light sterilizer, it is exposed to UV light from special lamps. This process is effective against viruses, E. coli, bacteria, and other harmful microorganisms, and it is also good for killing harmful microorganisms that are resistant to chlorine.

UV water filtration systems typically use lamps that produce ultraviolet light, which causes damage to the DNA of many common microorganisms, either killing them immediately or preventing them from replicating and rendering them harmless to humans. According to the CDC, UV sterilization is effective against:

  • Bacteria, including E. coli, salmonella and campylobacter
  • Viruses, such as enteric, norovirus, rotavirus and hepatitis A
  • Protozoa, including cryptosporidium and giardia

Depending on the intensity and the duration of the exposure, specially designed UV lights can be over 90 percent effective according to the EPA, even with chlorine-resistant microorganisms, such as cryptosporidium.

Parts Of A UV Light Sterilizer

A typical UV water filtration system consists of several components, including:

  • Pre-filter: For a UV system operate properly, the water must be relatively clear, so that the UV light can reach the microorganisms properly. A pre-filter eliminates contaminants that would make the system less effective.
  • UV chamber: This is a large pipe that houses the UV lamps and sensors, with a water inlet and outlet that allows water to pass through for sterilization.
  • UV lamps: Mercury vapor bulbs or, in newer systems, LEDs, that are housed in a quartz tube to protect them from liquid exposure.
  • UV sensors: Some systems use UV sensors, located near the lamps, to determine if the light output is sufficient for sterilization and to warn the user if it is not.
  • Solenoid valve: A motorized valve available on many systems that automatically shuts off the water if the system is not sterilizing properly.
  • Control system: Contains electronic controls for the system and ballasts that provide power for the UV lamps.

Filter water enters the UV chamber through the water inlet, quickly passes through the UV light, killing most microorganisms, and exits through the outlet.

The Benefits of UV Water Treatment

There are many benefits of using an ultraviolet light sterilizer for filtering your water:

  • It’s a convenient filtration option. The system doesn’t require much maintenance besides annual check-ins.
  • As mentioned before, ultraviolet light sterilizers are safe. This is because your water isn’t exposed to harsh chemicals while filtering out contaminants.
  • The process leaves your water odorless and tasteless. The last thing you want your water filtration system to do is make your water smell or taste bad. Ultraviolet light sterilizers will not affect the taste or smell of the water.
  • Because the water flows straight through, the whole process is rather quick. Unlike reverse osmosis, ultraviolet light sterilizers don’t have a holding tank. Therefore, the overall process is faster.
  • Some other systems filter out the contaminants and discard the wastewater. This system doesn’t create any wastewater because all of the water that goes through is sterilized and ready for drinking. It is environmentally friendly because it helps to conserve water.
  • The entire system is completely automatic, so you don’t have to worry about keeping track of anything.
  • UV sterilizers kill bacteria 24/7 without bleach, which creates “disinfection byproducts.” Healthy water without chemicals is better for hair and skin!

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Install an Ultraviolet Light Sterilizer in Your Maryland Home

Call Water Doctor to install an ultraviolet light sterilizer for your home’s drinking water supply. It’s a great option for everyone and especially effective for homes with well water. Keep you and your family healthy and safeguarded against bacterial contamination with an ultraviolet light sterilizer.

Frequently Asked Questions

How often should I change the bulb for a UV water sterilizer?

Most manufacturers and experts recommend you replace your bulb about once a year. More specifically, the average UV lamp has an estimated life span of 9,000 hours, or approximately 375 days.

Isn’t exposure to UV light bad for you?

Heavy exposure to UV light isn’t good for your skin for much the same reason it’s great for sterilizing water: UV radiation damages the delicate structures of microorganisms and cells and makes them nonfunctional or ineffectual.

Fortunately, it doesn’t leave any toxic residue or contaminate the water it treats, so you shouldn’t worry about any negative effects of UV water sterilizers.

Do UV sterilizers change how my drinking water tastes or smells?

UV sterilizers aren’t going to cause a substantial change to the taste of your water because they don’t remove the types of contaminants that change water flavor.

If you have strange-tasting water, we recommend sulfur removal and reverse osmosis to make your water more pleasant to drink.

Can I use a UV water sterilizer if I have a water softener?

Yes, the two technologies are compatible — your water should be softened and then sterilized because hard water can reduce your UV sterilizer’s effectiveness.

Will using a UV water sterilizer affect my water flow/pressure?

UV lights do need contact time to effectively kill bacteria and thus contain flow restrictors. Sizing the unit to match your water flow needs in the house can address this, so a properly sized UV light would not affect flow or pressure.

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Anne Arundel | Howard | Baltimore | Frederick | Montgomery | Carroll | Charles | Calvert | Queen Anne's | Harford