Test Name and details

pH | The degree of acidity or alkalinity

Result

7.04

Guideline

Range from 5-9

LOD

0.01 pH units

Test Name and details

TDS (mg/L) | Total dissolved solids (TDS) consist of inorganic salts and small amounts of organic matter that are dissolved in water. Total dissolved solids comprise: sodium, potassium, calcium, magnesium, chloride, sulfate, bicarbonate, carbonate, silica, organic matter, fluoride, iron, manganese, nitrate, nitrite and phosphates.

Result

513 mg/L

Guideline

No specific health guideline value is provided for total dissolved solids (TDS), as there are no health effects directly attributable to TDS. However for good palatability total dissolved solids in drinking water should not exceed 600 mg/L

LOD

< 7 mg/L

Test Name and details

Turbidity (NTU) | Cloudiness caused by fine suspended matter in the water. Expressed in NTU Units.

Result

0.3 NTU

Guideline

AG: Less than 5 NTU. However <0.2 NTU is the target for effective filtration of Cryptosporidium and Giardia.

LOD

< 0.1 NTU

Test Name and details

Water Hardness (mg/L CaCO3 equivalent) | Total Hardness of drinking water is roughly expressed and calculated as the sum of the concentrations of calcium and magnesium ions expressed as a calcium carbonate (CaCO3) equivalent.
Degrees of hardness can be described as follows:
Less than 60 mg/L CaCO3: soft but possibly corrosive
60–200 mg/L CaCO3: good quality
200–500 mg/L CaCO3: increasing scaling problems
Greater than 500 mg/L CaCO3: severe scaling

Result

205 mg/L

Guideline

Australian Drinking Water Guideline: Between 60 - 200 mg/L. Total hardness in major Australian reticulated supplies ranges between about 5 mg/L and about 380 mg/L.

LOD

0.05 mg/L

Test Name and details

Total Coliforms (cfu/100 ml) | Coliform bacteria are defined as Rod shaped Gram-negative non-spore forming and motile or non-motile bacteria. They are a commonly used indicator of sanitary quality of foods and water. Coliforms can be found in the aquatic environment, in soil and on vegetation; they are universally present in large numbers in the feces of warm-blooded animals. While coliforms themselves are not normally causes of serious illness, they are easy to culture, and their presence is used to indicate that other pathogenic organisms of fecal origin may be present. cfu = colony forming units

Result

95 cfu/100 ml

Guideline

None established

LOD

< 1 cfu/100 ml

Test Name and details

E.Coli (cfu/100 ml) | Unlike the general coliform group, E. coli are almost exclusively of fecal origin and their presence is thus an effective confirmation of fecal contamination.

Result

5 cfu/100 ml

Guideline

None established

LOD

< 1 cfu/100 ml

Test Name and details

Nitrate

Nitrate is made up of one nitrogen and three oxygen atoms and can be called a molecule, an ion or a salt when combined with potassium or other elements. Major uses of potassium nitrate are in fertilizers, tree stump removal, rocket propellants and fireworks. Plants utilise both potassium and nitrates to thrive.

Nitrite is similar but has only two oxygen atoms.

Based on health considerations, the guideline value of 50 mg-NO3/L (as nitrate) has been set to protect bottle-fed infants under 3 months of age. Up to 100 mg-NO3/L can be safely consumed by adults and children over 3 months of age.

Australian Drinking Water Guidelines (ADWG, 2018)

Nitrate and nitrite ions are also naturally occurring, with the nitrite ion being relatively unstable. Nitrate is formed from the oxidation of organic wastes such as manure, by the action of nitrogen-fixing bacteria in soils, or from lightning strikes through air in addition to their manufacture for use in explosives and inorganic fertilisers. Intensification of farming practices and sewage effluent disposal to streams have led to increasing amounts of nitrate in some waters, particularly groundwater. Food, particularly vegetables and cured meat, is the major source of nitrate intake for humans. Note that conventional water treatment is not effective for nitrate removal.

Result

7.36 mg/L

Guideline

Australian Drinking Water Guideline: <50 mg/L. Estimated Normal Background Level of nitrate in water: Usually less than 0.15 mg/L.

LOD

0.005 mg/L

Test Name and details

Nitrite

The nitrite ion is relatively unstable and can be formed by the reduction of nitrate in poorly oxygenated waters. It is rapidly oxidised to nitrate and is seldom present in well oxygenated or chlorinated supplies. Chemical and biological processes can result in further reduction to various compounds, including ammonia, or oxidation back to nitrate. Very high nitrate concentrations (up to 1300 mg/L) have been recorded in some groundwater supplies in rural areas in Australia. Nitrite can be converted to ammonia.

Based on health considerations, the concentration of nitrite in drinking water should not exceed 3 mg of Nitrite per Litre of water.

Australian Drinking Water Guidelines (ADWG, 2018)

Result

0.006 mg/L

Guideline

Australian Drinking Water Guideline: <3 mg/L. Based on health considerations, the concentration of nitrite in drinking water should not exceed 3 mg of Nitrite per Litre of water.

LOD

0.001 mg/L

Test Name and details

Ammonia

Ammonia, NH3, is actually added to drinking water at local water treatment plants to react with chlorine to form chloramine disinfectants, which in called – chloramination. This is not as powerful as chlorination (adding chlorine alone) but provides a longer lasting residual in the water distribution system. Chloramination produces several species of chloramines depending on the ratio of chlorine to ammonia, the pH and the temperature and of these monochloramines are preferred because they do not cause the taste and odour problems that can arise with dichloramines and trichloramines.

Importantly, water treatment workers need to be aware of the breakpoint phenomenon, whereby chlorine applied in sufficient doses will oxidise ammonia and eliminate chloramines thus forming a free chlorine residual. Chloramines are particularly suited to providing disinfectant residuals in long distribution systems, where it is difficult to maintain a residual using chlorine alone. However, different chloramine species, also called Disinfectant By-Products (DBPs) and that include Trihalomethanes (THMs), are toxic to humans.

Note also that the purity of chemicals used in Australia for the treatment of drinking water varies, depending on the manufacturing process. Ammonia is generally supplied at 99.9 % purity or better, but the product may include a very small amount of oil (hydrocarbons) and heavy metals.

Again, reiterating the importance of filtering your drinking water. See our hartgoods site for details

Result

0.026 mg/L

Guideline

Australian Drinking Water Guideline: <0.5 mg/L | Estimated Normal Background Level of ammonia in Water: 0.2 mg/L

LOD

0.005 mg/L

Test Name and details

Phosphate

There is no Australian Drinking Water Guideline for Phosphate. The Estimated Normal Background Level of Phosphate is less than 0.06 mg/L (based on total phosphorus levels). See Sciencing and Background-Information-for-Interpreting-Water-Quality-Monitoring-Results and Australian Government - National Pollutant Inventory - Total Phosphorus.

We have used a Precautionary Level of < 0.15 mg/L based on the fact the levels above this cause significant damage to ecosystems and adversely effect the processes in drinking water treatment plants. This is mostly caused by excessive use of fertilisers (that contain phosphorus as phosphates) and concentrated animal (and human) wastes with subsequent runoff into the drinking water supply causing excessive growth of algae (often the highly hepato-toxic blue-green algae).

Thanks to Waterwatch for this information on Phosphates/Phosphorus as there are no guidelines for Phosphates produced by the Australian Drinking Water Guidelines (ADWG, 2018)

Background concentrations for phosphate are approximately 0.01-0.06 mg/L when measured as Phosphorus (P). The phosphorus found in both surface water and groundwater is in a form called Phosphate (chemical formula, PO4). It is naturally derived from the weathering of rocks and the decomposition of organic material, but it can also enter waterbodies in runoff or discharges — soil and fertiliser particles can carry phosphorus, and sewage is also rich in phosphorus. Phosphorus is also an important nutrient in human and animal health.

Phosphates available to plants and animals are called orthophosphates, and exist in waterbodies as dissolved and particulate (suspended) and colloidal forms. Dissolved orthophosphate is immediately available to plants and animals. Particulate orthophosphate is potentially available to plants and animals. Colloidal polyphosphates are dissolved but not immediately available to plants. Plant growth is limited by the availability of dissolved orthophosphate.

A sudden increase in orthophosphate in inland waters can stimulate great increases in the growth of algae, particularly, as well as other aquatic plants. Algal blooms potentially produce toxins and also can cause large deficits of dissolved oxygen.

Phosphate in domestic waste enters the waterway from leaking septic systems, sewage treatment facilities and stormwater drains.

And, like Nitrate, Phosphate is widely used as a fertiliser and excessive use can end up in waterways resulting in Algal blooms that in turn produce toxins harmful to humans and fish.

Even small changes to low phosphorus concentrations (0.01–0.02 mg/L) can have a significant effect on the ecosystem, but existing field equipment cannot detect phosphate at concentrations below about 0.02 mg/L while our Lab can detect down to 0.005mg/L.

From - Module 4 – Physical and Chemical Parameters Waterwatch Australia National Technical Manual by the Waterwatch Australia Steering Committee

Result

0.314 mg/L

Guideline

There is no Australian Drinking Water Guideline for Phosphate. We have used a Precautionary Level of < 0.15 mg/L.

LOD

0.005 mg/L

Health Implications of high Nitrate/Nitrite exposure

Methaemoglobinemia is characterized by reduced ability of the blood to carry oxygen because of reduced levels of normal haemoglobin. It is uncommon. Infants are most often affected, and may seem healthy, but show signs of blueness around the mouth, hands, and feet, hence the common name “blue baby syndrome”. These children may also have trouble breathing as well as vomiting and diarrhoea. In extreme cases, there is marked lethargy, an increase in the production of saliva, loss of consciousness and seizures. Some cases may be fatal.

In the body nitrates are converted to nitrites. The nitrites react with haemoglobin in the red blood cells to form methaemoglobin, affecting the blood's ability to carry enough oxygen to the cells of the body. Bottle-fed infants less than three months of age are particularly at risk. The haemoglobin of infants is more susceptible and the condition is made worse by gastrointestinal infection. Older people may also be at risk because of decreased gastric acid secretion.

Malnutrition and infection seem to increase the risk of methaemoglobinaemia. The general health of the infant as well as Vitamin C intake may determine whether or not the condition develops

Others at risk for developing methaemoglobinaemia include: adults with a hereditary predisposition, people with peptic ulcers or chronic gastritis, as well as dialysis patients.”

World health Organisation (WHO)

There is concern that nitrite may react with foods rich with secondary amines to form N-nitroso compounds in the stomach: many of these compounds are known to be carcinogenic in animals.

Humans alter the way water moves through the landscape by clearing vegetation for agriculture or urban development and by constructing drainage that moves water quickly off the landscape into the receiving water bodies. These changes to the landscape mean that there is often insufficient vegetation around rivers and estuaries to utilise excess nutrients. This problem is exacerbated when extra nutrients are added onto the land in the form of fertiliser and animal manure, or also by changing the types of plants present.

Nitrates and phosphates drive or increase eutrophication, a form of nutrient enrichment in waterways; this causes excess production in waterways of algae and Cyanobacteria (also called blue-green Algae), and high concentrations of nutrients may encourage algal growth and result in nuisance or toxic algal blooms, eventually stripping oxygen out of the water, which leads to devastating fish kill events, seen in 2019 in Australia. The drought and mis-management of the crucial waterways in Australia has further exacerbated the situation.

Eventually these blooms will collapse and die and the resulting decomposition of the algal cells will strip oxygen out of the water, sometimes causing fish kill events.

Note that Cyanobacterial blooms are of concern in drinking water primarily because of the intracellular toxins they produce, which are of three main types; hepatotoxins, which damage liver cells, neurotoxins, which damage nerve cells and cylindrospermopsin, which can damage the liver, kidney, gastrointestinal tract and blood vessels.

If indeed, your results for Nitrate/nitrites and Phosphates are high, we offer an Algae Count that estimates numbers of Total Chroococcales (cells/ml), Total Nostocales (cells/ml), Total Oscillatoriales (cells/ml) and Total Cyanophytes (cells/ml) (Blue green algae).