How Flow Monitoring Facilitates Effective I/I Reduction

Alayna Dixon • December 10, 2025

Have you noticed unexpected flow spikes after it rains, manholes overflowing, or capacity issues with your sewer or stormwater system?

These issues often signal inflow and infiltration (I/I), one of the most common challenges utilities and municipalities can face. While other inspection methods can help reveal structural defects, only flow monitoring shows how your system performs (or fails) under real-life conditions. At Compliance EnviroSystems (CES), our experts continuously monitor flow to help clients identify the root causes of I/I and recommend the best rehabilitation plan(s).

How Flow Monitoring WorKS

CES installs Area Velocity flow meters, Pump Station Monitors, and/or Force Main Meters in key areas to measure depth, velocity, and flow during both dry and wet weather conditions. Dry weather data sets the baseline, while wet weather data reveals how the system fares during rain events.


By comparing these data sets, CES can quantify I/I, identify capacity issues, and pinpoint which areas of the system require further evaluation.

Turning Flow Data Into Action

CES data technicians study and analyze flow trends to identify areas experiencing the highest I/I or hydraulic stress. Our flow monitoring deliverables provide details on:


  • I/I rates and problem areas
  • Wet vs. dry weather performance
  • System vulnerabilities
  • Cost-effective inspection recommendations


Backed by 30 years of experience in system evaluations, this comprehensive approach helps CES clients better prioritize rehabilitation needs, avoid unnecessary cleaning or repairs, and stay compliant.

Comprehensive Flow Monitoring Services

CES offers flexible flow monitoring solutions for systems of any size, such as:


  • Temporary Flow Studies for short-term insight
  • Permanent Flow Networks for long-term system management
  • Flow Meter Maintenance to ensure accurate data throughout the course of your study
  • Pump Station Evaluations for performance improvement recommendations
  • Night Flow Isolation to expose hidden I/I


We customize each flow project to fit your budget and infrastructure needs.


Improve Your System (and Save Money) With Flow Monitoring Services

When done right, flow monitoring gives utilities and municipalities the information they need to make smart, data-driven decisions. Our main goal is to help you get the most from your budget by focusing on the most important repairs first and lowering treatment costs from excess flow.


If you’re ready to find I/I, check your system, and plan for the future with confidence, contact CES today to talk about your flow monitoring needs.

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