SWATGenXIntegrated watershed and groundwater modeling — built from public data, in hours.
Sign up with your .edu or .gov email and your account starts on the Starter plan automatically, through October 31, 2026: 12 new watershed models a month and 20 GB of storage. Calibration is pay as you go on every plan: you buy calibration credit ($50, $100 or $200) on your billing page, and each run is charged at standard AWS rates for the machine it uses. You choose how many runs work in parallel and how thorough the calibration is, we size the cloud machine to match, and you see the estimated cost before you launch. How it works and how we check your model: Calibration methods · Parallel engine · Model quality checks.
Outside the US, at a non-profit, or teaching? Write to us and we’ll set up the same access.
Subscription prices are set to cover what the platform costs to run: servers and cloud computing.
Every model on our servers stays in our checks. If we change something that affects it, we update it and tell you what changed. Models removed after notice are no longer checked or updated.
Cloud calibration is pay as you go, on every plan including Free. Buy calibration credit in $50, $100 or $200 packs from your billing page; each run is charged at standard AWS rates for the machine it uses, and you see the estimated cost before you launch. On Starter and MAX, your first payment also brings calibration credit equal to one month's price.
Unlimited means no monthly quota. If a plan is driven by automated bulk creation we will get in touch before anything changes.
Research collaborations — PFAS fate-and-transport studies like the Wurtsmith case study, or opening more public data — are arranged directly.
SWATGenX is a watershed modeling service built on peer-reviewed methods. Want evidence before you subscribe? Browse real example SWAT+ models from completed runs, or read the research portfolio.
What can I see without an account?
Every watershed. Open the Explorer, pick any basin, and you see the map and its summary panel without an account. Requesting or downloading a model, the analysis tools and well records need an account.
What does an account include?
The full map and the national inventories — groundwater, PFAS and soils — across every watershed rather than the first one, plus a workspace where your work is kept, and an API key for programmatic access, within your plan's limits. Building and downloading SWAT+ models starts on the Free plan, with 3 models; Starter and MAX add more models and the features each plan lists.
What does a plan add?
Model generation and delivery: SWAT+ builds at any watershed size — USGS gage, HUC12 outlet or a whole HUC8 basin — with watershed reports (whole-HUC8 flood reports on MAX and Department), floodplain, population, cropland and stream analyses.
How is cloud calibration handled?
Calibration runs on dedicated per-job AWS compute and is open to every account with calibration credit, Free included. Credit comes in $50, $100 or $200 packs from your billing page. The workflow shows each run's estimated cost before you start, and a run needs credit that covers its estimate.
Do you work with teams and institutions?
Yes. The Department plan covers one named group, and larger or bespoke arrangements — including PFAS fate-and-transport studies of the kind shown in the Wurtsmith case study — are made directly. Email info@swatgenx.com with your affiliation and what you are working on.
Do limits ever change?
Yes. This page is updated when limits change, and the "Your access" view in your account always shows your current limits.