Washington Phase II

MS4 compliance software for Washington Phase II permittees.

NPDESTracker is browser-based software built around the Western Washington Phase II MS4 permit issued by the Washington State Department of Ecology. Annual reports that roll up from records, mobile inspections for the field, and a GIS-aware workflow that fits alongside your existing ArcGIS or QGIS deployment.

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Free demo. Sample data. Browse-only. No signup.

01 · Built for the permit

Aligned to the Western Washington Phase II MS4 permit.

The product's data structures and workflows align directly to the Western Washington Phase II permit issued by Ecology. Each module maps to a Minimum Control Measure, and the annual report template reflects what gets submitted to Ecology by the March 31 deadline each year.

MCM 1

Public Education and Outreach

Documented events, audiences reached, and materials distributed.

MCM 2

Public Involvement and Participation

Public meetings, comment periods, and volunteer programs with attendance and minutes.

MCM 3

Illicit Discharge Detection and Elimination

Complaint intake, dry-weather screening, source tracing, and enforcement on a single thread per outfall.

MCM 4

Construction Site Runoff Control

Active-disturbance inspections, deficiency follow-up, and enforcement records aligned to your construction inspection cadence.

MCM 5

Post-Construction Stormwater Management

Live BMP inventory, annual inspections, and maintenance records for structural BMPs.

MCM 6

Pollution Prevention and Good Housekeeping

Municipal facility inspections, spill response, fleet operations, and staff training tied to MS4 obligations.

02 · Annual reporting

Reporting that holds up under Ecology review.

Every number in your annual MS4 report links back to its underlying record. Counts come from inspections, IDDE incidents, BMP records, and enforcement actions logged through the year — not from free-text fields you reconcile in a spreadsheet every March.

Manual overrides leave a one-line audit-log entry: user, timestamp, original value, new value, reason. When state-agency reviewers ask "what changed and why," the answer is on screen.

See how reporting works, or read the MS4 annual report checklist for Western Washington Phase II permittees.

03 · Inspections

Inspections that fit the field, not the office.

Mobile-first inspection workflow built for the inspector in the truck — phone, tablet, or browser. Photo and GPS attached to each record. Site context one tap away. Cadence-aware so overdue and due-soon items are flagged before they become audit findings.

See how inspections work, or read about stormwater inspection cadence and audit defensibility.

04 · GIS-aware throughout

Designed to coexist with your existing ArcGIS deployment.

Most Western Washington Phase II permittees already use ArcGIS Online or Enterprise as their primary GIS. NPDESTracker is built to live alongside that — not replace it. Sites, outfalls, BMPs, and incidents live on a map, color-coded by status, with the same coordinates your GIS team already maintains.

Imports standard GIS file formats (GeoJSON, shapefile). Coordinates exportable for ArcGIS, QGIS, or state-agency submittals.

05 · Pricing for Washington cities

Procurement-friendly pricing.

Three clear paths, sized to fit municipal budgets and procurement processes:

Free interactive demo

Self-serve, browse-only, sample data. No signup or call required. Try the demo.
90-day pilot — $4,900 flat (or $2,500 Founding City)

Procurement-card-friendly pricing for small Phase II cities. Founding City rate reserved for the first five cities. Pilot fee credits to year-1 if you convert.
Annual deployment — custom-quoted

Sized to your team, modules in scope, and onboarding needs. Full pricing posture.

Founding City program

For the first 5 paid pilot cities, this is a partnership.

The Founding City rate isn't a perpetual discount — it's the trade-off for being early. You take the risk of being among the first, and we treat you as a founding partner during the formative period.

$2,500 pilot rate, against the standard $4,900
Founder-led setup walkthrough during pilot kickoff
Direct access to the founder through the 90 days
Your input shapes the roadmap — features early customers ask for ship sooner

After the pilot, annual pricing follows the standard custom-quote process. The $2,500 is the pilot rate, not the annual program.

Email admin@npdestracker.com with subject "Founding City pilot inquiry" if your city would be a fit.

Practical guides for Phase II MS4 work.

Built for Washington. Try it now.

Open the interactive demo, then reach out about a pilot if it looks like a fit for your program.

Try the demo Or start a pilot