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Calculate. Log. Study. Troubleshoot.
Field intelligence, all in one place.

// Be first to know when we launch
✓ You're on the list — we'll be in touch.
No spam. Launch notification only.
// What's inside
01 //
Calculate

Instant results for chlorine dosage, CT calculations, flow rates, detention time, tank volume, pressure, mass loading, SVI, percent removal, and more. Show your work with one tap. Copy results straight to a text or email.

Water + Wastewater
02 //
Dr. H₂O Assist

AI-powered field troubleshooting built exclusively for operators. Ask anything — "why is my chlorine residual dropping?" or "what's causing my turbidity spike?" Get expert-level guidance instantly, any time.

AI · Field-Specific · Secure
03 //
Study

Formula reference, practice problems, and certification quiz content for water and wastewater operator exams. Regulatory Quick Reference keeps MCLs, action levels, and log removal requirements one tap away.

Operator Certification Prep
04 //
Log

Separate drinking water and wastewater log books. Record daily readings, export to CSV, and store your LAMP and compliance documents locally on your device — never uploaded, never shared.

Offline · Private · Yours
// Built for both disciplines
Mode 01
Drinking Water

Chlorination, filtration, coagulation, distribution system calculations, SDWA compliance, operator certification prep.

Mode 02
Wastewater

Activated sludge, mass loading, SVI, NPDES compliance, effluent limits, wastewater operator certification prep.

Born in the field. Built by an industry insider who knows what it's like to need the right answer fast — at 2am, on a remote system, with no one to call. No startup. No investors. Just the tool we always needed.

— FieldOps LLC · drh2o.app

Be First in the Field

Join the waitlist. Get early access when we launch.

✓ You're on the list — we'll be in touch.
No spam. Launch notification only.