private water supplies everything is voluntary!. sanitary well cap grout seal good casing sloping...
TRANSCRIPT
Private Water Supplies
everything is voluntary!
Sanitary well cap
Grout seal
Good casingSloping Ground
Soil
Bedrock
Groundwater “aquifer”
Water Table
X
Protect the Wellhead Area!
Some Problems Occur Naturally
Iron
Manganese
HydrogenSulfide
Corrosive
Hardness
We Cause Many Problems
How do I know what to
test my water for?
1. Symptoms – tastes, odors, stains
2. Local land use and activities
3. Local water testing results
Symptoms
• White residue, dull laundry - hardness
• Reddish stains, metallic taste – iron
• Black stains, metallic taste - manganese
• Rotten egg odor - hydrogen sulfide gas
• Blue stains, metallic taste - corrosive water
Be Aware of Local Activities
Activity Pollutants
Septic systems bacteria, nitrate
Highway sodium, chloride
Gas or Oil Wells petroleum, salts, metals
Agriculture pesticides, nitrate, bacteria
Gas or fuel storage gasoline, petroleum products
Industry, landfill organics, petroleum products
Mining iron, manganese, low pH
How close must activities be
to my well to cause a problem?
Coliform Bacteria
• A large group of common surface bacteria• Indicate the “potential” for harmful bacteria• Possible sources
– Surface water– Animal waste– Septic system
• Occur frequently especially in springs and shallow wells
The Most Common Problems
0
10
20
30
40
50
Bacteria Nitrate Lead Organics Pesticides
% of water supplies with problem
Common Aesthetic Problems
0
20
40
60
80
100
Corrosivity Hardness Iron
% of water supplies with problem
WaterTesting
•Routine tests give you protection
•Use certified labs!
•Annual bacteria test
•Every 3 years – pH, TDS, local pollutant
Interpreting a Water Test
• Compare your result with the Drinking Water Standard which gives the “acceptable” level
• Primary Standard (MCL)– health risk
• Secondary Standard (RMCL)– taste, stain, odor
Drought Stages
• Drought Watch– 5% voluntary water use reduction
• Drought Warning– 10-15% voluntary water use reduction
• Drought Emergency– Mandatory water restrictions– Ban on non-essential water use– These DO apply to private wells &
springs
How is the Drought Stage Determined?
1. Precipitation2. Stream flow3. Groundwater levels4. Palmer Drought Index5. Reservoir storage
-6
-4
-2
0
2
4
6
1930 1940 1950 1960 1970 1980 1990 2000
Historical Droughts in Pennsylvania
Palmer Drought Index
Drought Outlook
• Short-term relief likely
• Ground water and surface water drought will continue
• 12 to 20 inches of precipitation needed over next three months
Natural Groundwater FluctuationsGroundSurface
Deeper Underground
Submersiblepump
No pumping“static water level”
Normal “drawdown”
SporadicWater Loss
PermanentWater Loss
More and More Users!
Wells drilled 1966-1994
1 million wells and counting
Pennsylvania Water Law
• You do NOT own the water under your property
• You are entitled to “reasonable use”• Little protection of existing sources• Permitting of large users in Delaware
and Susquehanna Basins• Several pending bills on water use
Preventing a Dry Well
• Obtain your well log– Your well driller– Bureau of Topographic and Geologic Survey
• 717-702-2074
• Identify alternate sources• Always conserve water!• Talk to neighbors, local well drillers• Monitor your water supply if possible• Monitor nearby wells on the web
observed
average
record low
http://wwwpah2o.er.usgs.gov/
If You Lose Your Water . . .
• Water may return in time– Emergency water conservation– Reduce peak demands
• Have well driller determine the cause– Faulty or worn-out pump– Electrical problem– Low water level
• Lower the pump in the existing well• Deepen existing well• Drill new well
– Beware of unlicensed drillers
Always ConserveWater!
Achieving Water Conservation
• Change in water use habits
• Install water saving devices
Water UseStudy of Eight Families in Central PA
• Average use– 100 to 322 gallons per day
• Peak use– 240 to 880 gallons per day
SepticSystem
Consumptive Water Use
Non-Consumptive Water Use
Average Water Use
0
5
10
15
20
Toilet Shower Clothes Outside Other Bath Washer
Gallons per person per day
Toilet Water Use
0 1 2 3 4 5 6
Air Assisted
Low Flush
Standard
Gallons per Flush
Clothes Washer
• Standard – 40 to 55 gallons per load
• Front-loading– 22 to 33 gallons per load
Showers
• Standard – 4 to 6 gallons per minute
• Low flow– 2 gallons per minute
Faucets
• Standard– 4 to 6 gallons per minute
• Flow control aerators– Kitchen – 1.5 gallons per minute– Bathroom – 0.5 gallons per minute
Effect of Water Conservation
0
5
10
15
20
Toilet Washer Shower Faucets Leaks Baths DishWasher
gallo
ns
per
day
Without Conservation
With Conservation
Total savings = 32%
Water Harvesting
Types of Water Treatment
• Point of entry
• Point of use
Examples of Point of Entry
• Water softener
• Ultraviolet light (disinfection)
• Carbon filter (volatiles)
Examples of Point of Use
• Reverse osmosis
• Distiller
• Carbon filter– faucet or counter-top
Water Treatment
• Disinfection
• Ion exchange
• Oxidation-reduction
• Filtration
Disinfection
continuous chlorination
Ultraviolet Light Sterilizer
U-V Tube
Ion Exchange
Water Softening
• cation exchange process
• remove calcium, magnesium
• add sodium (potassium)
• will remove some iron
Schematic of Softener
Water Softener
RESIN(Sodium)
Raw Water
(Sodium)
Calcium & Magnesium
Treated Water
Ion Exchange: Sodium for Calcium & Magnesium
Oxidation
Iron Removal
Iron Treatment OptionsIron Concentration Chemical Form
of IronTreatment
Method
Less than 3 mg/L Colorless – reduced
Water softener or
polyphosphates
3 to 10 mg/L
Colorless (reduced) or
red (oxidized)Oxidizing Filter
More than 10 mg/L
Colorless (reduced) or
red (oxidized)
Oxidation followed by
filtration
Carbon Filtration
Filter Maintenance
• replace GAC every six
months
• dispose of spent GAC
properly
Solving Water Problems
• new source
• pollution control
• maintenance + inspection
• treatment
Before You Buy Treatment Equipment
• have your water tested by a certified labhave your water tested by a certified lab– don’t rely on in-home water test resultsdon’t rely on in-home water test results
• consult unbiased water quality expertsconsult unbiased water quality experts
• explore all alternativesexplore all alternatives– new source, pollution control,new source, pollution control,
maintenancemaintenance