Free water treatment log
Jump to download form ↓Enter your email below to download this water treatment log as a ready-to-use PDF.
Free HVAC water treatment log (PDF-ready). Record chemical dosing conductivity biocide and Legionella sampling for cooling towers per AS/NZS 3666.
Commercial Director
Updated 18 May 2026
How to use: download the PDF, print or complete digitally on any device.
- PDF format, ready to print or fill on screen
- Use as-is or customise to suit your operation
- Go digital in MapTrack for photos, alerts and audit trails
Download free PDF template
Trusted by teams across Australia and New Zealand
We respect your privacy. Unsubscribe anytime.
Used by construction, mining and field service teams
What is a water treatment log?
A water treatment log is a regulatory compliance register used to record every chemical dosing water test result and microbiological sample for cooling towers condenser water loops and other regulated water systems in HVAC plant. Unlike a service checklist that captures point-in-time inspection results the water treatment log is a running record kept across the full operational year with entries made by the water treatment contractor on each visit and by the building operator between visits. The log captures water chemistry parameters (conductivity pH free halogen biocide residual) make-up and bleed-off volumes dosing chemicals and quantities Legionella sample dates and laboratory results so the building owner can demonstrate continuous control of microbial risk to state and territory health authorities.
In Australia AS/NZS 3666.2 requires that cooling towers and warm water systems be operated and maintained to control Legionella risk with monthly water testing monthly heterotrophic plate count and quarterly Legionella sampling at a minimum. ASHRAE Standard 188 provides the international Legionella water management framework that many large building owners adopt voluntarily. State public health legislation (such as the Public Health Regulation 2012 in New South Wales) requires cooling tower owners to register their assets and submit annual compliance reports based on the water treatment log. A complete signed log is the primary evidence reviewed during a public health audit an insurance claim or an outbreak investigation and gaps in the record carry significant regulatory consequences. MapTrack helps building operators retain water treatment logs digitally against each cooling tower asset so historical chemistry trends and laboratory results are available for trending and audit response.
Learn more about maintenance and work orders in MapTrack.
Benefits of using this water treatment log
- Public health compliance: a complete water treatment log demonstrates ongoing control of Legionella risk to state health authorities under AS/NZS 3666.2 and the relevant state public health regulation
- Audit response: signed entries with date contractor and laboratory references provide the evidence that auditors and inspectors review during a routine compliance check or outbreak investigation
- Chemistry trending: continuous logging of conductivity pH and biocide residual reveals dosing drift scaling risk and corrosion conditions before they cause heat exchanger failure or biofilm proliferation
- Contractor accountability: every visit is recorded with technician name signature and chemical batch numbers creating a clear chain of responsibility for the water treatment programme
- Insurer protection: a properly maintained log is a recognised loss-prevention control that supports building insurance claims for water-related damage and limits liability exposure
- Operational savings: tracking make-up water bleed-off and chemical usage identifies opportunities to optimise cycles of concentration and reduce water and chemical spend across the portfolio
Benefits of digitising forms in MapTrack
When you digitise cooling tower logs in MapTrack, you get:
- Field users can easily scan a QR code to complete a form on mobile. Unlimited users.
- Automatically get alerts when faults are identified.
- Link every form digitally as a PDF to the relevant asset, location or person.
- Receive a digital PDF copy with every submission to your email.
- Ability to share forms digitally.
- Build conditional logic (show or hide questions based on answers).
- Take pictures or attach photos. Not possible with a paper-based form.
- Electronic signatures.
- Edit forms later without reprinting.
- Restrict permissions (who can view, complete or approve).
- Build forms with AI (describe what you need and MapTrack suggests the form).
- Log refrigerant charge weights and leak-check results against each unit.
- Schedule seasonal changeover inspections tied to heating and cooling cycles.
- Track filter, belt and coil replacement intervals per system.
Book a demo to see how MapTrack handles cooling tower logs.
Try MapTrack free for 30 days
Full access to every feature. No credit card required. Per-asset pricing so you scale as your fleet grows.
- No credit card required
- 30 days free trial
- Cancel anytime
Zero equipment loss
“Doing monthly site audits in MapTrack has drastically reduced our equipment loss and downtime.”
Khalid El-Hussein
NSW Store Manager, Axis Services Group
What to include in a water treatment log
This water treatment log covers 10 key areas:
- Asset details: site cooling tower designation make model capacity water volume and registration number with the local health authority
- Date and visit details: entry date water treatment contractor technician name and signature for every recorded visit
- Water chemistry: conductivity pH free halogen or biocide residual total dissolved solids and corrosion indicators measured on site
- Dosing record: chemicals added quantity batch number dose calculation and the running stock on hand after the visit
- Make-up and bleed-off: meter reading for make-up water and bleed-off calculated cycles of concentration and any blowdown adjustment made
- Microbiological sampling: dipslide heterotrophic plate count result sample date laboratory used and Legionella result with the colony-forming-units count
- Visual inspection: basin and sump condition fill media fouling drift eliminator condition and any biofilm or scaling observations
- Corrective actions: any water chemistry deviation dosing adjustment system disinfection or remedial cleaning carried out and the result
- Compliance certifications: annual risk management plan review contractor licence reference and the date the latest disinfection (shock chlorination) was performed
- Sign-off: contractor signature building operator acknowledgement and laboratory report attachment reference
How to use this water treatment log
- Set up the asset entry: record the cooling tower designation capacity in kilowatts or litres water volume manufacturer and the registration number issued by the local public health authority before any operational entries are made
- Record each contractor visit: at every water treatment contractor visit enter the date technician name company and signature alongside any conductivity pH free halogen and biocide residual measurements taken on site
- Log all chemical dosing: capture the chemical added quantity in litres or kilograms the batch number dose calculation method and the running stock balance after the visit so the chemical usage trend can be reviewed for the year
- Document make-up and bleed-off: read the make-up water meter and bleed-off meter calculate the cycles of concentration from conductivity ratios and record any blowdown adjustment made to maintain the target cycles
- Capture microbiological results: at every dipslide test record the heterotrophic plate count result and at every laboratory Legionella sample log the sample date laboratory the species detected and the colony-forming-units result against the AS/NZS 3666.3 action thresholds
- Address deviations: where any parameter falls outside the risk management plan limits record the deviation the corrective dosing or disinfection action taken the date and the post-action verification result that confirms control was restored
- Close the visit with sign-off: obtain the contractor signature the building operator acknowledgement attach the laboratory report reference and set the next scheduled visit date in the asset record
In MapTrack, you can track hvac maintenance and service schedules. Each submission is stored as a timestamped PDF against the asset record.
Get the free templateEnter your email above to download the full water treatment log as a PDF.Back to download formHow often should you complete this log?
Water treatment contractor visits are typically monthly for routine commercial cooling towers with weekly biocide checks and continuous conductivity logging between visits where automated dosing is installed. AS/NZS 3666.3 requires monthly heterotrophic plate count testing and quarterly Legionella sampling at minimum and the water treatment log must contain a continuous record across the operational year.
State public health legislation in jurisdictions such as New South Wales Victoria and Queensland imposes registration and annual reporting obligations on cooling tower owners with audit-ready logs presented to the local health authority each year. Annual risk management plan reviews six-monthly maintenance inspections and any shock chlorination event must also be recorded. MapTrack can hold every entry against the asset record so historical chemistry is available for trending and audit response.
Frequently asked questions
Applicable regulatory standards
This template aligns with the following regulations and standards:
- AS/NZS 3666.2
- AS/NZS 3666.3
- ASHRAE Standard 188
- Public Health Regulation 2012 (NSW)
- WHS Act 2011
Embed this free template on your website
Run an industry blog, trade association site, or training resource? Drop a preview of this free water treatment log straight into your page. The snippet is self-contained, needs no scripts, and links readers back to the full free template.
<div style="max-width:480px;font-family:system-ui,-apple-system,'Segoe UI',Roboto,sans-serif;border:1px solid #E5E7EB;border-radius:12px;padding:20px;background:#ffffff;">
<p style="font-size:12px;font-weight:700;letter-spacing:0.05em;text-transform:uppercase;color:#0E7490;margin:0;">Free template</p>
<p style="font-size:18px;font-weight:700;color:#071D49;margin:6px 0 0;">Water treatment log</p>
<ul style="margin:12px 0 0;padding-left:18px;color:#374151;font-size:14px;line-height:1.6;">
<li style="margin:4px 0;">Asset details: site cooling tower designation make model capacity water volume and registration number with the local health authority</li>
<li style="margin:4px 0;">Date and visit details: entry date water treatment contractor technician name and signature for every recorded visit</li>
<li style="margin:4px 0;">Water chemistry: conductivity pH free halogen or biocide residual total dissolved solids and corrosion indicators measured on site</li>
<li style="margin:4px 0;">Dosing record: chemicals added quantity batch number dose calculation and the running stock on hand after the visit</li>
<li style="margin:4px 0;">Make-up and bleed-off: meter reading for make-up water and bleed-off calculated cycles of concentration and any blowdown adjustment made</li>
<li style="margin:4px 0;">Microbiological sampling: dipslide heterotrophic plate count result sample date laboratory used and Legionella result with the colony-forming-units count</li>
</ul>
<p style="font-size:13px;color:#6B7280;margin:14px 0 0;padding-top:12px;border-top:1px solid #E5E7EB;">Free <a href="https://www.maptrack.com/templates/hvac-water-treatment-log" style="color:#071D49;font-weight:600;text-decoration:none;">Water treatment log</a> by MapTrack</p>
</div>Please keep the “by MapTrack” attribution link in the snippet.
Need to track hvac maintenance and service schedules?
Register every cooling tower in MapTrack, attach digital forms, and get a complete history of every inspection, service and compliance record.
Maintenance and work orders · All templates · Pricing · Book a demo