Stuck at 2 a.m.? Ask AquaSWMM.
AquaSWMM comes with an AI support assistant that has read the whole manual. Ask it how to set something up, what a run error means or where a setting lives, at any hour, and it answers in seconds with the manual section to check.
Not an add-on and not an enterprise extra: it is in the trial, Solo at $490 a year, and every other plan. A person still replies to every email within 24 hours.
How do I change the flow units from CFS to CMS?
Change FLOW_UNITS in Project → Options…, General tab. AquaSWMM then opens the unit-switch wizard, which lists each group of values the engine would otherwise misread. Tick the groups to convert and click Convert ticked; it is one undo step. Changing the keyword alone converts nothing…
Source: manual §8.2, §16.7
Support that does not keep office hours
Modelling problems turn up the night before a submittal, not between nine and five. The assistant is there for the questions a colleague down the hall would answer, so you are not waiting a day for an email to come back.
Grounded in the manual
It answers from the complete AquaSWMM manual, every chapter, and names the section it used so you can check. If the manual does not cover something, it says so instead of guessing.
Knows the error codes
Paste a run error or warning and it explains what the engine is complaining about, using the manual's notes on all 112 SWMM error and warning codes and the troubleshooting chapter.
A person behind it
For a bug, a licence, billing, or anything it cannot settle, one click sends your question, with the conversation, to a person who replies within 24 hours.
What you can ask
- Setting up a model: options, design storms, LID controls, ARM imports from PCSWMM, GIS imports.
- Runs: which engine ran, what an error or continuity warning means, why a run stopped.
- Methods and 2D: what a setting does, which 2D scheme to pick, how coupling and buildings work.
- Reports and results: where a table or plot lives and how to export it.
- Your licence and account, with your licence key added in the chat.
What it will not do
It helps you use the software. It does not give engineering opinions, approve or certify a design, or say a model meets a code or permit; that judgement belongs to the responsible licensed engineer. It sees only what you type into the chat, not your model files.
How much you can ask
| Who | AI questions a day | Human email reply |
|---|---|---|
| Visitors to this site | 10, to try it | Within 24 hours |
| 30-day free trial | 25 | Within 24 hours |
| Solo, Firm and every paid plan | 100 per seat | Within 24 hours (4 business hours on Priority Support) |
When the free questions run out, the assistant links to pricing; buying AquaSWMM keeps it going. Paid plans are never cut off for free use: part of each day's capacity is held back for paying customers.
How it compares
| Software | Built-in AI assistant |
|---|---|
| AquaSWMM | On every plan, including the free trial |
| EPA SWMM 5 | None |
| PCSWMM | None listed (checked November 2026) |
| XPSWMM | None listed (checked November 2026) |
| Autodesk InfoWorks ICM | Autodesk Assistant, from the 2027.2 release |
| Bentley OpenFlows Storm / Sewer | Bentley Copilot, a technology preview in OpenFlows 2026 |
Vendor capabilities change; this table reflects their public pages as of November 2026. See the full comparison.
Privacy
Your questions are sent to our server and to Anthropic's Claude model to produce the answer. We do not keep conversations beyond what is needed to answer and to enforce the daily limits, unless you send one to a person with a support request. Details are in the privacy policy. Do not paste confidential project information.