VerWater — Water Engineering

VerWater is a professional mobile app combining Water Quality Assessment, Wastewater Analysis, Hydraulics, Treatment Design, and Regulatory Standards into one powerful, offline-first toolkit for environmental engineers, consultants, and plant operators. WATER QUALITY INDEX (NSF) - NSF WQI by Brown et al. (1970) curve-based method - DO, BOD, pH, nitrates, phosphates, turbidity, fecal coliform, TDS, temperature - Auto classification from Excellent to Very Bad WASTEWATER AND BOD/COD - BOD5, BODu, ultimate BOD, COD removal efficiency - Temperature and k-rate corrections (Streeter-Phelps) - Industry auto-identification from BOD/COD ratio AERATION DESIGN - O2 demand for carbonaceous and nitrification - SOTR/AOTR with alpha, beta, theta factors - Diffuser selection, blower power, energy cost HYDRAULICS, NPSH, WATER HAMMER - Hazen-Williams, Darcy-Weisbach, Manning equations - Minor losses for fittings, valves, bends - Pump power and Affinity Laws (VFD optimization) - NPSH Available with cavitation status - Water Hammer (Joukowsky / Michaud) with pipe material library OPEN CHANNEL FLOW (MANNING) - Discharge or normal depth for rectangular, trapezoidal, triangular, circular channels - Auto Froude regime (subcritical / critical / supercritical) - Roughness library for urban and natural channels DISINFECTION - Surface Water Treatment Rule CT calculator — Giardia, Virus, Cryptosporidium - Trilinear interpolation across temperature, pH, residual - First-order Chlorine Decay in distribution mains - Minimum-residual compliance check SEDIMENTATION - Settling velocity — auto Stokes / Allen / Newton regime - Tank designer — Overflow Rate, Detention Time, Weir Loading Rate - Clarifier compliance bands (Metcalf and Eddy) STORMWATER - Rational Method peak flow with composite runoff editor - Time of Concentration via Kirpich and NRCS Lag - Runoff coefficient library REGULATORY STANDARDS - Surface Water Treatment Rule Disinfection CT (Giardia 3-log, Virus 4-log) - International drinking-water guidelines - Aquatic-life water-quality criteria - Water-framework priority substances - Thailand Surface Water (Class 1-5) and Effluent (Type A/B/C) - Automated compliance check CALCULATOR GUIDES Every tool has a built-in guide — what it is, how it works, key terms, when to use, worked example. WHY VERWATER? - 100% Offline — no internet required - Formulas from Metcalf and Eddy, Wylie and Streeter, ASCE/WEF - Deterministic equations, not AI guessing - One-time purchase, no subscriptions GOVERNMENT INFORMATION SOURCES Regulatory thresholds reproduced from publicly available official sources for engineering reference: - US Surface Water Treatment Rule (40 CFR 141): https://www.ecfr.gov/current/title-40/chapter-I/subchapter-D/part-141 - US Aquatic Life Water Quality Criteria: https://www.epa.gov/wqc/national-recommended-water-quality-criteria-aquatic-life-criteria-table - US Primary Drinking Water Regulations: https://www.epa.gov/ground-water-and-drinking-water/national-primary-drinking-water-regulations - WHO Drinking-water Quality Guidelines: https://www.who.int/publications/i/item/9789240045064 - EU Water Framework Directive: https://environment.ec.europa.eu/topics/water/water-framework-directive_en - Thailand Water Quality Standards (Notification B.E. 2537): https://www.pcd.go.th/laws/ GOVERNMENT AFFILIATION DISCLAIMER VerWater is an independent engineering reference tool by AI Visibility Rights. This app is NOT affiliated with, endorsed by, or sponsored by the US EPA, WHO, the EU, the Thailand Pollution Control Department, or any government entity. Agency names identify public-domain technical methodology only. Consult the original sources above for legally binding compliance. DISCLAIMER: For reference and educational purposes only. All engineering designs must be verified by a licensed professional engineer.