Water & environment6 min read

Sensor networks that protect drinking water at the source

Chesapeake Watershed Authority connected remote sensors to a single analytics layer — surfacing contamination risks hours earlier and replacing Monday-morning spreadsheet marathons with live, auditable data.

Chesapeake Watershed AuthorityMaryland & Virginia, United States
Marcus Okonkwo, Head of Water Quality
Marcus OkonkwoHead of Water Quality, Chesapeake Watershed Authority
Reservoir and water treatment infrastructure surrounded by forest
  • 4+ hours earlierContamination alert lead time
  • From 2 days to 20 minutesCompliance report prep
  • 340 across watershedSensor sites connected

The Chesapeake Watershed Authority monitors drinking water for 2.1 million residents across two states. Their challenge was not a lack of data — it was too much data in too many places. Field technicians logged readings on rugged tablets that synced overnight. Lab results arrived by email. Regulators wanted weekly reports built from sources that did not agree.

Monday mornings at the lab

Marcus Okonkwo’s team of fourteen analysts spent most of Monday reconciling sensor readings with lab confirmations before anyone could answer a simple question: is the water safe right now? During a turbidity spike in April, that delay meant the public affairs team drafted a precautionary notice based on incomplete data.

Our analysts used to stitch spreadsheets together every Monday. Now the data is live, auditable, and shared with regulators in a single click.

Marcus Okonkwo

One analytics layer, many sources

Netisen connected 340 remote sensor sites — turbidity, pH, dissolved oxygen, and flow rate — to a centralized platform with full data lineage. Lab results ingested automatically from the LIMS system. Threshold alerts routed to the right analyst based on watershed zone and severity, not a single shared inbox.

  • Real-time watershed dashboard with drill-down to individual sensor history
  • Automated anomaly detection calibrated to seasonal baselines
  • One-click regulatory export with audit trail for every data point
  • Field technician mobile app for manual samples with GPS and photo capture

The August storm test

When a tropical storm dropped six inches of rain in twelve hours, turbidity sensors upstream of the main intake spiked four hours before levels reached the treatment plant. The platform triggered a staged response: increased coagulant dosing, accelerated lab sampling, and a draft public notice held in ready status. The plant never breached safe thresholds. No boil-water advisory was issued.

Okonkwo’s team submitted the required state compliance report in twenty minutes that Friday — work that previously consumed two analysts for most of a day.

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