Radon Awareness Month 2021

Exterior Route ASD on white house

Exterior Route ASD

ASD exhaust on yellow house

ASD Exhaust on Multi family

Active soil depressurization












ASD exhausts being installed on 5 story apartment building

Waterborne radon Mitigation

Airader 433 s50 with 20 gallon tank

waterborne radon mitigation

Bubble Up Jr Interactive with Big Blue pre and post sediment filters and Atlantic Ultraviolet MP36 UV sterilization system











Waterborne radon removal using GAC

Single tank GAC with clear “big blue” pre& post sediment filters

Exhaust on stucco house

Hot water tank.

Dual Chamber RP 415 SDQP Bubble Up Aeration System


National Radon Awareness Month 2021 is coming to a close. Radon remains the second leading cause of lung cancer for general population…#1 cause of lung cancer in non-smokers. Besides some refinements in National Radon Proficiency Program (NRPP) training and techniques, not much has changed with airborne radon mitigation technology. Active Soil Depressurization (ASD) remains the primary mitigation strategy for reducing elevated airborne radon concentrations in both residential and commercial buildings. It remains the “go to” mitigation technique because it is highly effective, has a low impact on heating and cooling cost, is economical to run, and requires little maintenance.

Waterborne radon is a secondary contributing factor to elevated indoor radon concentrations. The majority of most home’s elevated indoor radon concentrations originate from soil gas entry into the home. This primarily occurs through the slab. When water containing radon is utilized in the home (i.e.; showering, laundry etc.), the waterborne radon off – gasses from the water and becomes airborne. Unlike airborne radon mitigation where technology has changed very little; waterborne radon mitigation has seen some significant developments in aeration system technology.

Aeration is recognized by the EPA as the best available technology for waterborne radon removal. This is because there is no collection of radon as there is with granular activated carbon (GAC), and removal efficiencies remain fairly consistent throughout the service cycle. GAC removal efficiencies decline as the carbon becomes loaded with other contaminants in the water. Today’s aeration systems generally consist of a built-in submersible pump to deliver good water pressure. Variable frequency drive pumps are also available to deliver great water pressure. Regardless of manufacturer; aeration systems will incorporate a blower, and some form of agitation component whether it be a bubbling chamber, or diffuser to create enough turbulence in the water to separate the radon from the water. Today’s aeration systems can deliver removal efficiencies of up to 99%. GAC can also deliver robust radon removal efficiencies.

The first step is to test. If the current pandemic has taught us anything; it’s the value of “knowing”. Knowing if you have a problem is the first step in fixing the problem. January is designated as Radon Awareness Month for a reason. Wintertime is generally worst case scenario for indoor airborne radon concentrations. Therefore; testing now will let you know if you and your family are being exposed to elevated radon. Unfortunately; many people will test once – in the middle of summer, get a low result, and think they have no issue. Meanwhile; the family is exposed to high radon levels for extended periods of time…when we’re in our homes the most. Covid 19 has dramatically altered work and lifestyles for many of us. Primarily; we’re spending significantly more time at home. We’re in our home environment much more than ever before.

Ultimately; our goal is lung cancer risk reduction. Lowering radon levels in both air & water is effective risk reduction. Our goal is to reduce radon concentrations as low as possible. Not every home can be reduced to < 1.0 pCi/l. There are even some homes that are difficult to reduce below 3.0 pCi/l. But the majority homes are able to be reduced below 4.0 pCi/l – if not 2.0 pCi/l. Reducing your indoor airborne radon concentrations to < 4.0 pCi/l, which is the EPA Action Level, provides meaningful lung cancer risk reduction. The State of CT recommends action if waterborne radon levels exceed 5,000 pCi/l. Aeration & GAC technology can easily accomplish this goal. Many of us watch the foods we eat, what we drink, and exercise when we can, all in the name of trying to live a healthy lifestyle. Why then, do we not monitor & remediate when necessary, the air we breathe & the water we consume, in an environment we have control over? – our homes!

Sediment Filtration

Removal of sediment from a water supply can be accomplished by several different technologies. Basic cartridge filters are the most common – and sometimes – most effective approach to preventing sediment from entering the home’s plumbing distribution system. The advantage of a cartridge-based filtration system is that you can experiment with cartridge sizes, and install one that best suits your needs in terms of particulate size it filters out, flow rate, and pressure drop.

Clear Big Blue sediment filter

Close up of clear “Big Blue” sediment filter mounted on bricks


5 micron clear Big Blue sediment filter

BB sediment filter

Sometimes a sediment problem is severe enough that you need to protect the well pump from premature wear and failure from pumping heavy amounts of sediment. This type of sand separator doesn’t remove all of the sediment from the water, but it lightens the load being pumped into the well tank.

sand separator for well pump

in – well sand separator

Another type of sand separator is mounted inside the home rather than in the well. It is typically positioned on the “well side” of the pressure tank to help keep the well tank and pressure tank clean. Like the in-ground separator, the sand separator that mounts in the basement will not remove all the sediment, but it can lighten the load of sediment entering the well tank. A purge valve is needed with these types of separators to periodically flush away the sediment it has separated from the water. There are automatic and manual purge valves. Automatic is worth the cost difference in the long run.

In house lakos sand separator

Sand separator with post deep well sediment filter

As previously mentioned, sometimes sediment removal requires several stages. This can be a combination of a sand separator and cartridge filter, multiple cartridge filters installed in series, with progressively tighter mesh cartridges, or an automatic backwashing sediment filter followed by a cartridge filter as a polisher.

Backwashing sediment filter followed by cartridge filter

Sediment filtration is a necessary part of water treatment. Sediment in your well water can be very damaging to the components of your well system, plumbing system, and water utilizing appliances. Call us at 800-319-8867 to find out what sediment removal strategy will work best in your home.

Protect private water supplies from viruses and bacteria using UV Sterlization

Private water wells are vulnerable to contamination from many different sources. Not the least of which are viruses and bacteria. When you consider a private water well is little more than a hole drilled into the ground; the quality and “healthiness” of the water begins to come into question. As noted in the previous blog; basic potable water supply protection begins with extending the well head or casing above ground level. This process eliminates the possibility of ground water entering the potable water supply via the top of the well head. But a casing extension doesn’t guarantee that the water supply will be free of contaminant.

Ultra Violet Light (UV) sterilization is a proven way to guarantee protection from exposure to microbiological pathogens in your well water. A UV system cab be thought of as an insurance policy against the unforeseen danger that may lurk in our well water.

UV sterilization system.

High flow UV sterilization

The high flow UV sterilization system pictured is a system we installed in a school. It is installed downstream of a 10,000 gallon storage tank that supplies potable water to the entire facility. The system is capable of sterilizing up to 40 gallons per minute.

UV sterilization for private well

12gpm Atlantic Ultraviolet MP36C UV System

There are various sized UV systems to accommodate any sized home or building, regardless of flow rate. It is important that any UV sterilization system be fed water that has been filtered down to 5 microns, is less than 7 grains hard, and has iron and manganese within acceptable limits. The reason for these parameters is to ensure optimal UV ray transmittance through the water to achieve maximum sterilization capabilities of the UV system.

UV bulbs emit roughly 95% of their energy at a short wavelength of 254 nanometers (known as UV-C). This wavelength is in the region of maximum germicidal effectiveness, and is highly lethal to viruses, bacteria, and mold spores. UV bulbs will maintain this efficiency for a year. As such; UV bulbs need to be changed out annually.

With the current Corona virus outbreak in mind; it is comforting to know that highly effective technology is available at an affordable price to protect our private drinking water well supplies. It is a “green” technology that leaves no residual in the water supply treated. Please touch base for a no-cost evaluation to install a UV sterilization system in your home.

Viqua D4 Premium

Viqua UV Sterilization System

Well Casing Extension

Well Casing Extension

Buried wells are still common in CT. These older wells are more susceptible to contamination from groundwater infiltration due to rotted well seals. Any new well that is drilled today must have the well casing extend above grade level with a water tight well cap. This ensures keeping the access (the well head) to your potable water supply as secure as possible.

We can convert your old buried well to a compliant above – grade well with a casing extension. The attached pictures demonstrate the progression of a well casing extension starting with the buried well…ending with an extended casing and a water tight well cap. Call us for more info or visit our website at: www.connecticutradon.com

Radon in Water Mitigation By Aeration

Aeration is recognized by the EPA as the “BAT” or; Best Available Technology for radon in water mitigation.  The primary advantages of aeration are: 1) no build up or collection of radioactivity, #2) consistent removal efficiency #3) improved water pressure, and pH adjustment.

CT Basement was the first CT based radon mitigation company to offer waterborne radon removal.  We installed our first aeration system in early 1988.  A lot has changed in the residential aeration system market.  The first generation aeration systems we installed were manufactured by North East Environmental Products (NEEP) out of New Hampshire.  Their 3311 shallow tray aeration system was an adaption from packed tower aeration systems that were utilized to aerate municipal supplies.  Re-pressurization of treated water was accomplished by a conventional shallow well jet pump and pressure.  These systems were capable of up to 99% removal efficiencies

In late 2003, we began installing aeration systems that offered a built – in submersible pump. Getting away from the shallow well jet pump re-pressurization configuration made an appreciable difference in operational noise, water pressure delivered, and footprint of systems.  Since then, RE Prescott – Bubble Up, and Spruce – AiRaider, have made several improvements to include overflow protection, variable frequency drive re-pressurization, and larger tank options while delivering up to 99% removal efficiencies.  Below are pictures of various system installs we’ve done.


When choosing an aeration system for radon in water mitigation, radon in water levels, size of house, size of area where system is to be located, and even the size of the family living in the home, are all factors that should be taken into consideration.  Our experienced staff of radon and water professionals can help guide you to the best decision for your particular application.

Any aeration system bubbles and / or sprays the water in some fashion to separate the radon from water.  Radon is “water phobic” and readily off-gasses. The radon that separates from the water is safely vented out of the unit to the roof line of the home.  The treated water is stored at atmospheric pressure within the aeration tank and needs to be re-pressurized. A re-pressurization pump will draw the water out of the tank and send it to point of use.

Make no mistake; any aeration system is a mechanical device that requires regular servicing to optimize system life.  Regardless of manufacturer, and even with regular servicing, there are things that will eventually go wrong with the system. Including solenoids, float level switches, blowers, and pumps.  It is also important to maintain good water quality being supplied to the aeration system.  Elevated iron or manganese, hardness, and sediment are all things that will create issues with an aeration system.  We have the most collective experience under one roof to ensure we keep your system up and running efficiently.