Protecting Household Drinking Water Developed by: Susan Donaldson University of Nevada Cooperative...
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Transcript of Protecting Household Drinking Water Developed by: Susan Donaldson University of Nevada Cooperative...
Protecting Protecting Household Household Drinking Drinking WaterWater
Developed by:Developed by:Susan DonaldsonSusan DonaldsonUniversity of Nevada University of Nevada Cooperative ExtensionCooperative Extension
UNCE, Reno, NV
What we’ll cover:
Watersheds and water pollution How wells work How to test drinking water Protecting well water supplies Septic systems Keeping septic systems working
properly
Watersheds
FISRWGUSDA NRCS
Water cycle
UNCE, Reno, NV
Ground water
Wells
DNRC, MT
Who protects my drinking water?
The Safe Drinking Water Act, first created in 1974, is the main federal law that regulates drinking water provided by municipal water suppliers
The EPA sets standards and oversees water suppliers
Ensuring safe water from private wells is the responsibility of the homeowner
How do I know if my water is safe to drink?
Where can I have my water tested?
Private labs vs. state health labs Make sure lab is certified for
drinking water analysis Check with lab before you do the
test to make sure you have all the necessary information
Ask about costs and turnaround time
What should I test for?
NEW WELLS OR NEW HOMES: Test for bacteria Request a separate general water
chemistry panel analysis
What’s included in a standard chemistry panel?
pH TDS Hardness Calcium Magnesium Sodium Potassium
Chloride Nitrate Alkalinity Bicarbonate Carbonate Fluoride Arsenic Iron
Manganese Copper Zinc Barium Color Turbidity Sulfate
What should I test for every year?
EXISTING WELLS: Test for bacteria Test for pH, nitrate and total
dissolved solids (TDS) Test for any constituents that are at
or near the drinking water standard
What should I test for every five years?
Have a complete water chemistry analysis performed
Always keep copies of ALL results so you can track changes in your water quality over time.
Also test your water if you: Are considering the purchase of
water treatment equipment Want to check the performance of
existing water treatment equipment Are purchasing a new home, and
want to know if the water supply is of good quality
Also test your water if: You have drilled a new well, and
want to know if the water is safe to drink
You are pregnant, are planning a pregnancy, or have an infant less than 6 months old
Your septic system absorption field, or your neighbor’s, is close to the well (within 100 feet)
Also test your water if your well is located near a:
Gas station or fuel storage tank Retail chemical facility Gravel pit Mining operation Oil or gas drilling operation Dump, landfill, junkyard, or factory Dry-cleaning business Road-salt storage area, or heavily salted
road
Test your water and fix the system if:
Anyone in the household has recurrent gastrointestinal illnesses
Your well does not meet construction codes
Water leaves scaly residues and stains
Water is cloudy or colored
Test your water and fix the system if:
Pipes show signs of corrosion Water supply equipment wears out
rapidly, including pumps or water heaters The area around the wellhead has been
flooded or submerged Back-siphoning has occurred Water smells or tastes bad
Test your water and fix the system if:
Your well is in or close to a livestock confinement area, such as a corral or feeding area
You have mixed or used pesticides near the well, or have spilled pesticides or fuel near the well
You have a heating oil tank or underground fuel tank near the well that you know has leaked
A poorly collected sample is worse than no sample at all …
and wastes your money!
DNRC, Bozeman, MT
How do I take a water sample?
First, call the lab for sample containers and procedures
Use the appropriate container for the type of sample
Store the sample carefully according to instructions before taking it to the lab
How do I take a water sample for bacteria?
First, call the lab for sample containers and procedures
Never rinse out the sample container, as it is sterile and contains a preservative
Samples must be kept cool and delivered to the lab within a short period of time (often less than 24 hours) or they will not be analyzed
What do the results mean? Compare your lab report to the drinking
water standards If any values exceed the standards, DO
NOT DRINK THE WATER! Retest if bacteria, nitrate or organic
parameters exceed the standards If concentrations are increasing between
samples, try to determine and mitigate the source of pollutants
Units of measurement
ppm = parts per million
That’s one drop in one million drops of water
Or, it’s one pancake in a stack four miles high!
ppb = parts per billion
That’s one drop in one billion drops of water
Or, it’s one penny in ten million dollars!
Units of measurement
One part per million (ppm) is the same as one milligram per liter
Milligram per liter is abbreviated as mg/l
A. Miller
How can I protect my well water supply?
Consider: Location Construction Condition
UNCE, Reno, NV
Can you find the wellhead?
DNRC, MT
Well separation distances
DNRC, MT
Don’t do this! Fence Don’t do this! Fence your well out of your your well out of your pasture or holding area.pasture or holding area.
UNCE, Reno, NV
Well construction
DNRC, MT
Well protection
DNRC, MT
Adapted from Clark Conservation District, MT
Septic Systems
Out of sight and out of mind…until you smell them!
DNRC, MT
How much water do YOU use per day?
Showers12.6 gallons
Clothes Washers
15 gallons
Dishwashers1 gallon
Toilets20 gallons
Faucets11 gallons
Leaks10 gallons
Baths1.2 gallons
Misc.1.5 gallons
Components of a septic system
Cleanout
Septic tank
Leachfield
Junction boxHouse
Inspection ports
Baffles
A. Miller
A. Miller
Avoid products with the following warnings on the labels:
“Harmful if swallowed” “Avoid contact with the skin” “Do not get in open cuts or sores” “If product comes in contact with
eyes, call a physician immediately”
Always read the product label!
Where does the liquid effluent go?
A. Miller
Do you know???
Where your tank is? How big it is? When it was last
pumped? The location of your
leachfield?
DNRC, Montana
Maintaining your septic system
PUMP YOUR TANK!
Keep your bacteria healthy and happy UNCE, Reno, NV
Suggested pumping interval (years)
Tank Size
(gallons)
1 2 3 4 5 6
1000 12 6 4 3 2 2
1250 16 8 5 3 3 2
1500 19 9 6 4 3 3
Number of people in your household
To pump... or not to pump
Pumping costs about $200 for the average 1250-gallon tank, every three years or so
A new leachfield costs from $5,000 for an inground system to as much as $20,000 for an engineered field
Which would you choose?
What can I plant on or near my leachfield?
Grasses Perennial and
annual flowers Many perennial
groundcovers
All trees Large shrubs
OK to Plant Avoid Planting
Other causes of septic failure Overloading. Use water
sparingly. Do only full loads of wash at off-peak times, if possible, and try to limit the number of loads daily.
Placement in poor drainage area
Water leaks Driving over the drainfield
Other causes of septic failure
Pouring kitchen grease into drains
Failure to install according to septic codes
Flushing cigarette butts, sanitary napkins or other inorganic materials down the toilet
Other causes of septic failure
Extensive use of garbage disposals Tree roots clogging pipes - contact
a septic contractor for repairs Use of salts and chemicals from
water softeners and washing machines
What about additives?
Enough bacteria are present in the tank from normal bodily wastes
Additives cost $$$ and may actually increase the solid material in the tank by producing inert ingredients
There is no substitute for pumping!
Tips to keep your septic system working well
Don’t water the leachfield Don’t flood the system with
excessive water use Keep excess solids out of the
system and avoid flushing toxins down the drain
Tips to keep your septic system working well
Avoid using your garbage disposal to process large quantities of wastes
Regularly pump out the septic tank and inspect the physical components of the system
Don’t park or drive over the leachfield
These tips will keep your system working properly for generations.