2NFORM, The Best Stormwater Compliance Software

2NFORM is a GIS-based stormwater management software designed to help you meet the requirements of your MS4 permit, reduce local flooding, plan green infrastructure projects, and mitigate your impact on receiving waters.

Use 2NFORM, stormwater compliance software, on all of your devices, desktop or mobile

One system for all your work

Intelligent stormwater compliance software

The spatially explicit 2NFORM system helps you to keep track of the location and condition of your assets, facilities, and projects. Analytics and visualizations deliver insights to guide policy, investments, and operations. There is no software to manage: your data is stored securely in our cloud-based platform and accessible from anywhere, anytime.

Deep control of your stormwater practices and compliance

Purpose-built for stormwater managers

MS4 compliance reporting

Mapping & GIS features

Data-driven insights and trends

Smartphones, not clipboards

Schedule and track work

MS4 compliance reporting

2NFORM streamlines your MS4 annual report compilation efforts. 2NFORM tracks and analyzes all of your program activities throughout the year and summarizes them into the corresponding section of your MS4 permit. Automated short narratives, populated with your program details, concisely summarize your program progress over the year, including quantitative values calculated from your records within 2NFORM.


The embedded 2NDNATURE science provides you with quantified stormwater pollution reduction accounting to track and report the clean water impact of your program efforts.

2NFORM stormwater compliance software inputs your numbers into narrative summaries for your annual reports

Fit for purpose

A spatially explicit approach to stormwater science

Our widely cited TELR methodology empowers stormwater professionals to understand their current water quality conditions and the opportunities for improvement. 2NFORM automatically returns volume and pollutant reduction estimates based on existing and planned water quality improvement investments to efficiently track progress toward clean water outcomes.

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2NFORM stormwater compliance software lets you see your MS4 on interactive maps built on Esri

I can feel confident that we’re using our limited resources in the most effective way possible.”

Heidi Niggemeyer

NPDES Program Manager | Salinas, CA

Learn how Heidi is using 2NFORM to save time and money, while developing a collaborative relationship with her regulator.

Read the case study
Heidi Niggemeyer

A modular stormwater compliance software to meet every need

We know that each organization has unique needs, priorities, and budgets. 2NFORM is a modular system, designed to let you purchase exactly the functionality you need to help your program. You can purchase modules individually or in bundles. Have a chat with our team and we will work with you to craft the solution that fits your needs and budget.

Municipal Maintenance Module

Keep your house in order by inventorying assets and optimizing operations

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Industrial/ Commercial Module

Inspect, verify, enforce industrial and commercial facility compliance

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Construction Module

Manage an effective construction site run off control program

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Post-Construction Module

Track essential documentation of private stormwater assets

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Illicit Discharge Module

Track non storm-related flows in the urban landscape

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Public Education & Outreach Module

Make clean stormwater solutions actionable to your community

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Structural BMP Diagnostics Module

Inventory and monitor public and private sBMPs

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Trash Compliance Module

Achieve stormwater trash reduction goals

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2NFORM stormwater compliance software is built on Esri

Better together


As an Esri partner, we’ve thoughtfully incorporated ArcGIS APIs into our 2NFORM platform and taken great care to ensure you can fully leverage your investment in ArcGIS tools and data. 2NFORM brings MS4 stormwater compliance and science to your ArcGIS, eliminating the need for you to develop and maintain complicated custom configurations and code.

Always learning

Dive Into Our Helpful Resources

Read case studies

2NDNATURE Resources


Let us help you map a better way

Book a personalized demo to see how our products provide the visibility you need to streamline compliance, achieve your goals, and focus your energy on clean waterways.