Compliance as a continuous output, not an annual fire drill.

Continuous pH, turbidity, and chemistry monitoring, evidence-grade history, and audit-ready reports for the EU Drinking Water Directive, EPA frameworks, and equivalents.

The challenge

Regulators want demonstrable, continuous water-quality compliance. Reality is usually different: data lives across three vendor systems, audit prep takes a fortnight of someone reconciling spreadsheets, and a missed sensor outage isn't noticed until the auditor asks for the reading that wasn't there.

The stakes get higher every cycle — newer regulations (the 2023 recast EU Drinking Water Directive; EPA's lead-and-copper rule revisions) ask for more parameters, finer cadence, and more transparent reporting.

What success looks like

100% Of regulatory parameters monitored without manual log entry
Same week Audit-ready report turnaround — not the multi-week reconciliation today
Zero Gaps in evidence when a regulator asks for a specific date/time/point

How WaterTwin delivers it

  • Continuous in-line monitoring — pH, turbidity, free chlorine, conductivity, temperature, and any custom metric your sensors report, retained at full resolution.
  • Satellite cross-validation — Sentinel-2 indices for source waters and reservoirs give you a second, independent signal when ground sensors disagree with one another.
  • Threshold alarms with audit trail — every exceedance recorded with timestamp, value, threshold, severity, and who acknowledged it.
  • Inspection templates for sampling rounds — pre-built checkpoints for chemistry tests, calibration verifications, and visual inspections, with photo and signature capture.
  • Sensor-health monitoring — if a sensor stops reporting, you get alerted before the audit discovers it. No more "the probe was offline that week" moments.
  • Exportable evidence — every reading, every inspection, every alarm acknowledgement is queryable and exportable in formats your compliance team can hand to the regulator directly.

A typical compliance workflow

  1. Define each regulated parameter with its limit, cadence, and reporting jurisdiction.
  2. Map sensors and sampling rounds to those parameters. WaterTwin tracks coverage and flags gaps.
  3. Continuous data flows in; threshold breaches trigger alarms with severity-aware routing.
  4. Periodic compliance reports are produced from the same live data — no separate workflow.
  5. At audit time, you hand over a query (or the auditor browses the dashboard themselves) instead of preparing a binder.

Where this matters most

  • Drinking-water treatment plants with continuous regulatory obligations.
  • Distribution networks with residual disinfection requirements at customer points.
  • Wastewater discharge points with effluent limits and pollution-incident reporting.
  • Bottled-water and industrial process water with similar continuous-monitoring needs.

What you need to start

  • The list of regulated parameters and their limits for your jurisdiction.
  • In-line analysers publishing over MQTT, OPC UA, Modbus, or Sparkplug B (any of the four).
  • A sampling-round template if you do manual chemistry — we'll digitise it.

Bring your next audit. We'll show you a different way to prepare.

Tell us the parameters you have to report and we'll demo the continuous-evidence model with a sample.

Book a walkthrough