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.