Is Your Tank Water Safe?
NATA-accredited laboratory analysis, delivered to your door.
Trusted by households, farmstays, B&Bs, and rural properties across Australia.
How It Works
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Step 1 - Select and purchase your test
We mail you a testing kit complete with laboratory testing bottles and step by instruction of how to collect your sample.
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Step 2 - Collect a water sample
Fill the supplied laboratory testing bottles with a sample of your drinking water. Place the bottles in the supplied postage parcel complete with pre-paid express shipping return label and place in post.
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Step 3 - Laboratory Testing
Your water sample will be sent to a NATA accredited Australian laboratory for testing. Our laboratory partners typically complete the analysis within 5 business days.
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Step 4 - Receive your results
Your detailed Water Quality Analysis Report is delivered as a digital PDF — plain-English results benchmarked against Australian drinking water guidelines, with the original NATA-accredited Certificate of Analysis included.
01
Microbiology — The Primary Risk
Unlike town water, rainwater tanks have no disinfection residual. E. coli enters through bird and possum droppings on roofs, decomposing organic matter, and inadequate first-flush diversion. It is the single most important test for any tank supply.
E. coli
Thermotolerant Coliforms
02
Roof & Gutter Metal Leaching
The roof catchment is a direct contamination pathway. Lead leaches from flashing and solder joints. Zinc dissolves from galvanised iron roofing. Copper enters from copper gutters and downpipes — particularly in the first flush after dry periods.
Lead
Zinc
Copper
Arsenic
Mercury
+ 13 metals
03
Nutrients from Animal Waste
Bird and possum droppings, decomposing leaf litter, and organic debris accumulating in gutters are a direct source of Nitrate and Ammonia. Elevated nutrient levels also promote bacterial growth within the tank itself, compounding microbial risk.
Nitrate
Ammonia
04
Physical & Aesthetic Quality
Tannins from leaf litter cause colour and staining. Sediment from poor first-flush diversion raises turbidity. Low pH from rainwater acidity accelerates metal leaching from the tank and plumbing. These parameters are often the first visible sign of a problem.
Turbidity
Apparent Colour
pH
TDS
Hardness
Conductivity
05
UV Disinfection System Performance
Tank water high in dissolved organic matter can quench UV disinfection before it reaches rated effectiveness. UV Transmittance at 254nm measures the organic load that interferes with UV treatment — a result below 75% indicates your UV system may not be operating at its rated dose, even if the unit appears to be working normally.
UV Transmittance (254nm)
06
Mineral Balance & Water Chemistry
Rainwater is naturally soft and slightly acidic — it has very low mineral content and limited buffering capacity. This makes tank water more corrosive to fittings and appliances than town water, and more likely to dissolve metals from tank linings and plumbing.
Alkalinity
Calcium
Magnesium
Sodium
Chloride
Sulphate
07
Pesticides, Insecticides & Herbicide Spray Drift
Rural and peri-urban properties are at risk from agricultural spray drift landing on roofs and entering the tank catchment. Herbicides such as atrazine and simazine are applied at high volumes across broadacre cropping and are among the most commonly detected agricultural chemicals in tank water. Organochlorine and organophosphate insecticides persist in water and are not removed by standard tank filtration.
Atrazine
Simazine
Dieldrin
Chlorpyrifos
Diazinon
+ 60 compounds
08
PFAS "Forever Chemicals"
Tank water near defence bases, airports, or industrial sites may be contaminated by PFAS through atmospheric deposition and stormwater runoff. These compounds do not break down and accumulate in the body over time. The 2025 ADWG tightened limits by up to 94%.
PFOS
PFOA
PFHxS
PFNA
+ 26 compounds
What We Screen For
Rainwater tanks have no disinfection and no regulatory monitoring. What's in your tank depends entirely on your roof, your gutters, and what's in the air above your property.
Four testing levels to match your concerns
| 01Microbiology — The Primary Risk | ||||
| E. coli & Thermotolerant ColiformsFaecal indicator bacteria — enters through bird and possum droppings, leaf litter, and inadequate first-flush diversion. Tank water has no disinfection residual to suppress bacterial growth. | ✓ | ✓ | ✓ | ✓ |
| 02Roof & Gutter Metal Leaching | ||||
| 18 metals & metalloids — incl. Lead, Zinc & CopperLead (flashing and solder joints), Zinc (galvanised roofing), Copper (gutters and downpipes), Arsenic, Cadmium, Chromium, Mercury, Nickel, Iron, Manganese, Barium, Cobalt, Silver + more. Leaching is highest in the first flush after dry periods. | ✓ | ✓ | ✓ | ✓ |
| 03Nutrients from Animal Waste | ||||
| Nitrate, Nitrite & AmmoniaFrom bird and possum droppings, decomposing leaf litter, and organic debris in gutters. Elevated nutrients also promote bacterial growth inside the tank, compounding microbial risk. | ✕ | ✓ | ✓ | ✓ |
| 04Physical & Aesthetic Quality | ||||
| Turbidity & pHTurbidity from sediment and poor first-flush diversion. pH from rainwater acidity — low pH accelerates metal leaching from tank linings and plumbing. | ✓ | ✓ | ✓ | ✓ |
| Apparent ColourTannin staining from leaf litter and organic debris — one of the most common tank water complaints. | ✕ | ✓ | ✓ | ✓ |
| UV Transmittance (254nm)Measures dissolved organic carbon that affects UV disinfection system performance. A result below 75% indicates your UV system may not be operating at rated effectiveness — useful for households with UV treatment installed. | ✕ | ✓ | ✓ | ✓ |
| 05Mineral Balance & Water Chemistry | ||||
| 14 physical & chemical parametersEC, TDS, Hardness, Total Alkalinity, Bicarbonate, Carbonate, Hydroxide Alkalinity, Calcium, Magnesium, Sodium, Potassium, Chloride, Sulphate. Rainwater is naturally soft and acidic — low mineral content makes it more corrosive to fittings and appliances. | ✕ | ✓ | ✓ | ✓ |
| 06Pesticides, Insecticides & Herbicide Spray Drift | ||||
| 55 pesticides & insecticides at trace detection levelOrganochlorines — Dieldrin, DDT, Heptachlor, Lindane, Endosulfan + others. Organophosphates — Diazinon, Chlorpyrifos, Malathion + others. Persist in water and not removed by standard filtration. | ✕ | ✕ | ✓ | ✓ |
| 10 triazine herbicides at trace detection levelAtrazine, Simazine, Propazine, Terbuthylazine + 6 others. Among the most commonly detected agricultural chemicals in tank water via spray drift. | ✕ | ✕ | ✓ | ✓ |
| 07PFAS — "Forever Chemicals" | ||||
| 30 PFAS compounds at trace detection levelPFOS, PFOA, PFHxS, PFNA + 26 precursors at 0.001–0.005 µg/L. Enters tank water near defence bases, airports, and industrial sites through atmospheric deposition. The 2025 ADWG tightened limits by up to 94%. | ✕ | ✕ | ✕ | ✓ |
| What's Included | ||||
| Complete sampling kit delivered to your door | ✓ | ✓ | ✓ | ✓ |
| Pre-paid express cold-chain return shipping | ✓ | ✓ | ✓ | ✓ |
| NATA-accredited laboratory analysis (No. 1261) | ✓ | ✓ | ✓ | ✓ |
| Colour-coded PDF report benchmarked against ADWG | ✓ | ✓ | ✓ | ✓ |
| Plain-language exceedance explanations | ✓ | ✓ | ✓ | ✓ |
| Total parameters tested | ~23 | ~38 | ~104 | ~134 |
01Microbiology
✓
E. coli & Thermotolerant ColiformsFaecal indicator bacteria — enters through bird and possum droppings, leaf litter, and inadequate first-flush diversion. Tank water has no disinfection residual.
02Roof & Gutter Metal Leaching
✓
18 metals incl. Lead, Zinc, Copper, Arsenic+ 13 others. Highest in first flush after dry periods.
04Physical & Aesthetic Quality
✓
Turbidity & pHSediment cloudiness and rainwater acidity — low pH accelerates metal leaching from tank linings.
Not included — upgrade to Essentials Plus
✕
Apparent Colour · UV Transmittance · 14 chemistry parameters · Nitrate, Nitrite & Ammonia · Pesticides · Herbicides · PFAS
A$349
~23 parameters · inc. cold-chain return shipping
Order Now
Most Popular
Essentials Plus
What's actually in my rainwater — and is it safe for my family?
Order Now — A$49901Microbiology
✓
E. coli & Thermotolerant ColiformsFaecal indicator bacteria — the single most important test for any tank supply.
02Roof & Gutter Metal Leaching
✓
18 metals incl. Lead, Zinc, Copper, Arsenic+ 13 others. Highest in first flush after dry periods.
03Nutrients from Animal WastePlus+
✓
Nitrate, Nitrite & Ammonia Plus+From bird and possum droppings and leaf litter. Elevated nutrients promote bacterial growth inside the tank.
04Physical & Aesthetic Quality
✓
Turbidity & pHSediment cloudiness and rainwater acidity.
✓
Apparent Colour Plus+Tannin staining from leaf litter — one of the most common tank water complaints.
✓
UV Transmittance (254nm) Plus+Measures dissolved organics affecting UV disinfection performance. Below 75% indicates your UV system may not be operating at rated effectiveness.
05Mineral Balance & Water ChemistryPlus+
✓
14 chemistry parameters Plus+EC, TDS, Hardness, Alkalinity, Calcium, Magnesium, Sodium, Potassium, Chloride, Sulphate + more. Rainwater is naturally soft and more corrosive to fittings than town water.
Not included — upgrade to Advanced
✕
55 Pesticides & Insecticides · 10 Triazine Herbicides · 30 PFAS compounds
A$499
~38 parameters · inc. cold-chain return shipping
Order Now
Includes Pesticides
Advanced
Could spray drift from nearby farms be in my tank water?
Order Now — A$74901Microbiology
✓
E. coli & Thermotolerant Coliforms
02Roof & Gutter Metal Leaching
✓
18 metals incl. Lead, Zinc, Copper, Arsenic+ 13 others.
03Nutrients from Animal Waste
✓
Nitrate, Nitrite & Ammonia
04Physical & Aesthetic Quality
✓
Turbidity, pH & Apparent Colour
✓
UV Transmittance (254nm)Dissolved organics affecting UV disinfection performance.
05Mineral Balance & Water Chemistry
✓
14 chemistry parameters
06Pesticides, Insecticides & HerbicidesAdvanced+
✓
55 pesticides & insecticides at trace level Advanced+Organochlorines — Dieldrin, DDT, Heptachlor, Lindane + others. Organophosphates — Diazinon, Chlorpyrifos, Malathion + others.
✓
10 triazine herbicides at trace level Advanced+Atrazine, Simazine, Propazine, Terbuthylazine + 6 others. Most commonly detected agricultural chemicals in tank water from spray drift.
Not included — upgrade to Complete
✕
30 PFAS compounds at trace level — relevant near defence bases, airports, or industrial sites.
A$749
~104 parameters · inc. cold-chain return shipping
Order Now
Includes PFAS
Complete
Is there PFAS in my tank water from a nearby base or airport?
Order Now — A$94901Microbiology
✓
E. coli & Thermotolerant Coliforms
02Roof & Gutter Metal Leaching
✓
18 metals incl. Lead, Zinc, Copper, Arsenic+ 13 others.
03Nutrients from Animal Waste
✓
Nitrate, Nitrite & Ammonia
04Physical & Aesthetic Quality
✓
Turbidity, pH & Apparent Colour
✓
UV Transmittance (254nm)Dissolved organics affecting UV disinfection performance.
05Mineral Balance & Water Chemistry
✓
14 chemistry parameters
06Pesticides, Insecticides & Herbicides
✓
55 pesticides & insecticides + 10 triazine herbicides at trace levelOrganochlorines, Organophosphates, Atrazine, Simazine + others.
07PFAS — "Forever Chemicals"Complete+
✓
30 PFAS compounds at trace detection level Complete+PFOS, PFOA, PFHxS, PFNA + 26 precursors at 0.001–0.005 µg/L. Enters tank water near defence bases, airports, and industrial sites via atmospheric deposition. 2025 ADWG tightened limits by up to 94%.
A$949
~134 parameters · inc. cold-chain return shipping
Order Now
Want everything in one kit?
Complete Water Audit — 214 Parameters
Every contaminant class in a single kit — metals, PFAS, pesticides, herbicides, VOCs, PAHs, microbiology, nutrients, and disinfection by-products. Trace-level detection throughout. Works on any water source.
A$1,299
Inc. GST
View Details
Looking for a specific test?
Roof Metals Screen
18 metals & metalloids
Lead, copper, zinc, arsenic, mercury, chromium and 12 more — standalone screen for roof and gutter catchment contamination pathways.
A$199
View Details
PFAS Screen
30 PFAS compounds · Trace level
PFOS, PFOA, PFHxS + 27 precursors at trace detection (0.001–0.005 µg/L). For properties near defence bases, airports, or industrial sites.
A$399
View Details
Microplastics Screen
8 polymer types · Specialist analysis
PE, PP, PS, PVC, PET, PC, PMMA, PA particle counts in potable water. No safe limit has been set under the ADWG — we report what's present so you can make an informed decision.
A$1,099
View Details
All analysis performed by NATA-accredited laboratories under ISO/IEC 17025:2017 · All prices include GST · Cold-chain return shipping included
