Commercial & Industrial Rainwater with Cistern Applications

Collect your own rainwater for irrigation, truck cleaning, and a variety of other non-potable uses!

We design, supply, and install commercial and industrial rainwater systems for facilities across Ontario and select regions in Canada. From large underground or insulated above-ground cisterns to treatment, pumping, and controls, our solutions turn roof or site runoff into reliable non-potable for a variety of needs, including fire-prevention storage. We engineer to local codes and performance targets (flow, turnover, redundancy), help with LEED/ESG documentation, and provide turnkey commissioning and maintenance.

Applications

• Process water reuse (equipment cooling, washdown, batch makeup)

• Non-potable building supply (with backup city feed)

• Irrigation (landscape, greenhouse, courtyard features)

• Fire-prevention cisterns (drafting points or pump suction integration)

• Fleet depots & yards (water for truck wash systems, wash pads, dust control)

• Stormwater capture & detention to reduce discharge fees

Our Services

• Cisterns: underground PE/fiberglass/concrete or insulated above-ground tanks (10,000–250,000+ US gal)

• Filtration & treatment: screens, sediment filtration, UV/chemical disinfection as required

• Pumping & controls: duty/standby pumps, VFDs, level sensors, BMS integration, and auto city-water bypass allowances

• Design & approvals: drawings, submittals, control narratives, CSA/NSF component alignment

• Installation & commissioning: turnkey install, testing, and training

• Service plans: seasonal inspection, cleaning, performance verification

Technical Notes (general)

• Pre-treatment: roof drains → basket/leaf screens → first-flush (as required)

• Storage sizing: rainfall yield + demand profile; turnover to manage water age

• Water quality: treatment train matched to end use and local requirements

• Controls: low/high level interlocks, make-up valve, trend logs, alarm notifications

• Compliance: cross-connection protection; backflow prevention; labeling

Outcomes for Owners

• Reduce municipal water costs and stormwater fees

• Improve ESG/LEED metrics with measurable onsite reuse

• Increase resilience during restrictions or supply interruptions

• Centralized data & alarms for operations teams

Frequently Asked Questions

How big should a commercial cistern be?

Most projects fall between 25,000–150,000 US gallons, driven by roof catchment, reuse demand, turnover, and fire storage (if included).

Can one system serve toilets and irrigation?

Yes. We commonly design multi-use systems with prioritized demand, city-water backup, and clear labeling.

What treatment is required?

It depends on end use. Typical trains: screening + cartridge/centrifugal filtration, then UV or chemical disinfection for building uses.

What about winter?

Underground tanks operate year-round. Above-ground systems use insulation, heat tracing, and enclosure; lines are protected and monitored.

Do you work outside Ontario?

Yes — select projects across Canada. We coordinate local code requirements and fire department standards.

Service Areas

Ontario (GTA, Golden Horseshoe, Ottawa, SW & Central Ontario) with select commercial/industrial projects across Canada.

Book a consultation

Request a commercial/industrial site review and preliminary sizing.

Email: info@RainwaterSolutionsCanada.com

Toll-free: 1-833-RAIN-H2O