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RoanokeVAHWQP-2011-2017

published by Erin Ling

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Household Water Quality
The Virginia Household Water Quality Program provides affordable water testing and education through local Extension offices to the 1.7 million Virginians who rely on wells, springs or cisterns for their household water supply.
Roanoke County 2011-2017
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What's in your water?
Municipal water supplies are regulated under the Safe Drinking Water Act, which mandates routine testing and treatment.  Maintenance and testing of private water supplies (wells, springs and cisterns) is the responsibility of the owner.  Virginia Cooperative Extension offers water testing and education for private water supply users across the state
Drinking water clinics are held in county Extension offices each year.  Here's how it works:
Participation is voluntary and open to anyone with a well, spring or cistern. Participants pick up a sample kit and receive instructions about how to collect the samples from their household tap and where and when to drop off their samples.    
Following directions carefully, participants collect their samples and complete a short questionnaire. Samples are dropped off locally, so shipping is unnecessary. We coordinate getting the samples to Virginia Tech's campus for analysis.
Samples are analyzed for total coliform and E. coli bacteria, nitrate, lead, copper, arsenic, fluoride, sodium, hardness, iron, manganese, total dissolved solids, pH, and sulfate. The cost for one sample kit in 2017 was $55. Confidential results are prepared and returned to the Extension office.
Results are returned to participants and explained at a local interpretation meeting. Information is provided about addressing water quality problems, routine care, and maintenance of private water supplies.
Kickoff Meeting
#1
Sampling
#2
Analysis
#3
Results
#4
Europe
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Rest of world
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Water Systems in Roanoke County (2011- 2017)
254 samples analyzed Serving 479 people Well depth: 25-2003 feet Well age: 4-70 years
Sixteen percent of participants did not know what type of system they had.   The most common source reported was drilled wells.
Systems
60% of participants reported having treatment installed.   The most common device was a sediment filter.  
Treatment
Contaminants in water may be health-related (e.g., bacteria) or a nuisance (e.g., hardness causing scale) and can come from a variety of sources. Some contaminants originate from geology, the sediment or rock where the water is stored. Others are a result of land usage or activities on the earth's surface, such as lawn fertilizer, animal waste, or chemical spills. Proper construction of a well can protect household water quality by preventing surface water, which may carry many contaminants, from entering the groundwater supply. Wells should be constructed with proper casing, grout seal, and a sealed well cap. Contamination sources, such as livestock and septic systems should be at least 50 feet away from the well head. Treatment devices and plumbing components can also influence water quality by adding contaminants or changing water chemistry.
Landuse and nearby activities
Plumbing materials and water treatment
Well construction and location
Hydrogeology
Where do contaminants come from?
Household water quality
For more  information about other common contaminants, please visit our Resources Page.
www.wellwater.bse.vt.edu
Virginia Household Water Quality Program Email: [email protected] Ph: 540-231-9058
The most common contaminants found in household water in Roanoke County were total coliform bacteria, sodium, hardness, copper and low pH.. 

 Total coliform bacteria presence is an indication that surface water may be entering a well and other more harmful microorganisms may be present. Total coliform was found in 32% of the Roanoke County samples.

Hardness is composed of calcium and magnesium, which originates in bedrock such as limestone. Sodium concentrations above recommended levels are most likely the result of water softeners, used to remove hardness. Sodium can have negative health effects in excess levels.

  Low pH (<6.5) can occur naturally in parts of Virginia geology.  Although not a concern in itself, low pH can be a driver of how corrosive the water is. Once the water enters the house it can result in metals such as copper and lead leaching into the water from plumbing components that contain these metals, such as brass fittings or copper pipes. 


Household water quality in Roanoke County: Common Contaminants
Hardness
Total coliform bacteria
Copper
Sodium
Low pH (<6.5)
Special thanks to the residents of Roanoke County who participated in the Virginia Household Water Quality Program drinking water clinics. Extension agents Deb Chappel, Kim Butterfield and Kathleen Reed, among other partners, were instrumental in the program's success.