Archive for the ‘drinking water’ Category

Water quality – its Basic!

Saturday, December 24th, 2016

Its December and in South Gippsland our creeks have slowed to little more than a trickle. Like many rural properties we have to rely on water stored in dams to get us through to Autumn. Our garden and nursery stock put extra demands on our supplies, and of course the cows are always thirsty!

Around the farm we use rainwater tanks for the house and dam water for the cows. We also need water to wash down the dairy. For that we keep back and recycle rinse water but use dam water as well. In the dairy we need better quality water for washing down milking machines and for feeding to calves. For this we use rain water supplemented with treated dam water.

Through Summer as water levels fall, dam water comes under many stresses. This shows up as changes in pH, oxygenation, build up of nutrients and salts, turbidity and organic matter levels.

Farm dam at low water level in Summer

One of our dams at low level during Summer of 2015. As water level drops basic water quality can change and is shown by factors like clearness, oxygenation, pH, salts and nutrients.

Where does water come from for your farm or rural property? Are you getting the right quality for the right use?

A water test can be a good first step to get your water supply right. It can tell which supplies can be used in different parts of the farm. A test can also pick up changes in water quality or even hazards in the water.

There are many options to treat water so that it can be used in more critical applications. At Apps Laboratories we provide the testing that gives a start in improving your water quality.

Our Basic water quality test is designed to test for around 9 critical water quality factors. We do the tests in our own lab – on our farm.

No you won’t be left with a report that makes no sense because we highlight all the key issues and talk about the possibilities for your water in a way that ‘normal folks’ understand because we know that’s what you expect.

Our Basic water quality test is good for tank water, dams, springs and bores.

To get your water tested is easy. Just go to our appslabs.com.au How to order page for instructions on collecting and posting samples.

My tank drinking water smells, what can I do?

Monday, December 31st, 2012

One of the frequent problems seen in water tanks is smelly water. This can occur in above and below ground tanks and includes rain water tanks. People often describe the smell of their water as musty, decaying or like ammonia or rotten eggs. It can be just a little bit off-putting or in some cases can be very unpleasant. In any case its hard to drink and wash in smelly water.

The ammonia or rotten egg smell is a give away for anaerobic conditions. In other words poorly aerated water.  The first test to do when investigating smelly tank water is a redox test. Redox or oxidation reduction potential is an indicator of oxygenation and unlike oxygen level tests redox can also show very anaerobic conditions.

Tests from one underground tank with smelly water showed that redox was 145 mV just below the water surface. Generally redox in the 200 – 250 mV range is commonly seen and acceptable for drinking water. Below 0 mV is definitely not good. So 145 mV was a little low but not too bad. However at the kitchen tap where water is drawn from deep in the tank the redox was -58 mV. Now that is bad! It indicates anaerobic water. This water had an unpleasant ‘eggy’ smell.

testing being carried out on a below ground concrete rain water tank. The tank is dug into a slope with no barrier to stop runoff running onto the tank.

Testing being carried out on a below ground concrete rain water tank. The tank is dug into a slope and risks contamination because the tank is level with the ground on the uphill side.

Checklist for smelly tanks:

  • is there runoff entering the tank?
  • have you been on holidays or have you just bought the property?
  • do the downpipes from the roof go underground then come back up before the tank?

What can be done about smelly water? If the smell can be traced to anaerobic conditions the simplest thing to do is direct the stream from a garden hose back into the tank. Just ripple the water and try to get a slow circulating movement happening in the water.  There’s no need to do anything too drastic like emptying the tank or throwing in handfulls of chlorine. All you need to do is get oxygen back into the water to reverse the reactions that created the smells in the first place. As a safeguard think about installing a cartridge water filter, one that has an activated carbon cartridge. That will help to remove some of the smells and will be good insurance against any future contamination. The Basic Water Quality Test from Apps Laboratories is designed to test water quality factors and can be used to trouble shoot water quality problems. Apps Labs also supplies rural and farm water filters.

Filters for farm water supplies.

Saturday, December 8th, 2012

Not all water quality problems for farm and rural drinking water can be solved by simple filters. However there is a lot that can be done to improve drinking water quality. Its often a matter of being proactive in case contamination occurs. Dual cartridge systems are easy to install and can often be fitted under the kitchen sink. The choice of cartridges depends on the source of the water.

Above ground or well protected rainwater tanks usually don’t build up bacteria levels but they can develop undesirable smells if poorly aerated. Use a sediment cartridge and a 5 micron carbon cartridge. At Apps Laboratories we have selected some dual cartridge combinations that can be applied to different situations. See them at Drinking water systems.

If you have to backup your water supply from a creek or dam then use a sediment cartridge plus a finer carbon cartridge, one that is designed to reduce waterborne protozoan pathogens. Your carbon cartridge should reduce some turbidity so that UV treatment can be added. UV is very effective against bacteria provided there is not too much dissolved organic matter in the water. Ask Apps Laboratories for a Basic water quality test.

Many farms source water from fairly protected situations like springs or bores. But there may be fine silt or sediment and a risk from bacteria. Again a fine carbon cartridge like the KX Matrikx Cr1 is recommended. The second cartridge will be a special ceramic cartridge such as the Doulton Sterasyl. Ceramic cartridges are very effective at reducing bacteria. At Apps Laboratories we have tested ceramic cartridges and the results are reported in Ceramic cartridge test.

Doulton Sterasyl ceramic cartridge for bacteria reduction.

Doulton Sterasyl ceramic cartridge for bacteria reduction.

For more details on Rural and farm drinking water systems please see Rural and farm systems.