# Water and Waste Management — 250 Formulas for engineers > Engineering formulas and calculators for water and waste management. (iPhone/iPad app by Historycentral.com Inc.) - Source: https://appshunter.io/ios/app/water-and-waste-management/id357817097 (this page in markdown: same URL + `.md`) - Developer: [Historycentral.com Inc](https://appshunter.io/developer/1744330560) - Category: Productivity, Business - Price: Free with in-app purchases - Rating: 3.00/5 from 4 App Store ratings · 6 written reviews indexed - Age rating: 4+ - Requires: iOS 18.6 · 18 MB - Languages: American English - Released: 2010-02-24 - Data updated: 2026-06-05 - Monetization: free - User reviews in markdown: https://appshunter.io/ios/app/water-and-waste-management/id357817097/reviews.md ## What is Water and Waste Management? WATER & WASTE MANAGEMENT, part of MultiEducator's "Formulator" line, is the essential tool for any Water & Waste Management engineer or engineering student. This comprehensive application contains over 245 specialized engineering formulas covering all major areas of water and wastewater engineering, plus nearly 900 conversion formulas — over 1,100 formulas in total. Engineering categories include: Water Flow, Groundwater, Sewage Treatment, Pollution, Activated Sludge & Sludge Digestion, Water Supply, Facilities (Chemical Dosing, Distribution, Disinfection & Laboratory), Storm Runoff, Sewer Pipe, Waste (Gases, Liquid & Solid), River Pollution, Hydraulics (Hazen-Williams, Darcy-Weisbach, Bernoulli), Pumping (Horsepower, NPSH, Affinity Laws), Water Treatment (Chlorine Dosage, CT Values, Chemical Feed Rates, Filtration), and Wastewater Operations (BOD Loading, SVI, F/M Ratio, MCRT, Detention Time, Removal Efficiency). The app also includes conversion calculators for Area & Volume, Pressures, Linear Measure, Weights, Liquid Measures, Cubic Measures, BTU, Horsepower, Watts, Power, Hydraulic, HVAC, Flows, and over 460 Metric conversions — plus eight temperature scale converters. All formulas display results in both US and Metric units with a single toggle. Calculations can be saved, exported, and shared. Toggle between US and Metric units instantly. If you need a formula we haven't included, just email us and we'll add it in the next update. ## Key features - Over 1,100 engineering formulas - Water and wastewater engineering categories - Nearly 900 conversion formulas - US and Metric unit display - Save, export, and share calculations - Formula request feature ## Pricing and in-app purchases Base price: Free. **One-time purchases** | Purchase | Price | Type | | --- | --- | --- | | Water & Waste Pro | $4.99 | one-time | ## Recent user reviews (6 of 6) All indexed reviews: https://appshunter.io/ios/app/water-and-waste-management/id357817097/reviews.md ### 1/5 — Get the Ads out. *2019-10-01* Paid app with Ads and no mention in description? Get the ads out. ### 5/5 — App repairs *2018-04-18* I had issues with the app. I called the producer and left a message. They called me back with in 24 hours. I explained my issues, they said they would repair them. With in 24 hours The app was updated. This was the best service I have ever had. First class company! ### 5/5 — Great *2012-09-21* This is a great start ### 1/5 — If your not going to put ALL the formulas on this ! I won't be buying either !! *2012-05-03* Don't buy it ! I'm studying for some water test , thought this app might help ? BIG waste of money !! The water Sifo pod casts are way BETTER . I don't think this app is even worth one star !! ### 1/5 — Terrible app. *2010-06-01* I must agree with the previous poster. This app is worthless. I, too work in this area and find that the formulas are not only worthless, but also cumbersome to operate. I can't believe I paid $5 for it and was excited to pay it. Huge disappointment!!! ### 2/5 — Come on devolopers *2010-03-02* I work in this area so I thought why not.... I bought your $10 arch app to help with water treatment day to day stuff and I find it just as usefull as this app. I can think of at least 15 more formulas that we deal with on a daily basis. I would gladly email you those formulas but it would take me all day. Its not a bad idea but if you are gonna charge us $5 then you need to put some effort into your apps. A simple google search located me 7 formulas that are not in this app. I have spent alot if money on this devolopers apps and they all are made with great potential but all fail. Put some more love and care into your apps and we will gladly pay a little more as well. ## Frequently asked questions about Water and Waste Management ### What is Water and Waste Management? Water and Waste Management is a productivity app that offers over 1,100 specialized engineering formulas and conversion calculators for professionals and students in the water and wastewater engineering fields. It aims to provide quick access to essential calculations and data. ### What types of engineering formulas are included in Water and Waste Management? The app covers a broad spectrum of water and wastewater engineering topics. This includes formulas for water flow, groundwater, sewage treatment, pollution control, water supply, facility operations, storm runoff, sewer pipes, waste management, hydraulics, pumping, and water treatment processes. ### Can I switch between US and Metric units in Water and Waste Management? Yes, Water and Waste Management allows you to instantly toggle between US and Metric units for all formula results. This feature is designed to accommodate different regional standards and user preferences. ### Can I save or share my calculations from Water and Waste Management? Absolutely. The app enables you to save your calculations for future reference. You can also export and share these calculations, which is useful for reporting, collaboration, or documentation purposes. ### What is the update frequency for Water and Waste Management? The app was last updated on March 22, 2026, indicating a recent update. The developer also mentions that they will add requested formulas in the next update, suggesting a commitment to ongoing improvement and user-driven content. ### Is Water and Waste Management available on Android devices? Based on the provided data, Water and Waste Management is supported on iPhone and iPad. Information regarding Android compatibility is not available in this data. ### What is the user rating for Water and Waste Management? Water and Waste Management has a rating of 3.0 stars based on 4 ratings. This indicates a mixed reception from its current user base. ### Does Water and Waste Management have ads? No, Water and Waste Management does not contain advertisements. The app is free to download and use without any ad interruptions. ## Version history (last 5 releases) ### 4.02 — 2026-03-22 Minor bug fix ### 4.01 — 2026-03-16 Bug fix ### 4.0 — 2026-02-23 Totally rewritten with the ability to compare results, 40 new formulas ### 3.02 — 2018-04-16 This app has been updated by Apple to display the Apple Watch app icon. Fixed data input for 5S ### 3.01 — 2018-04-12 Bug fixes- specifically with data entry on certain phones ## More apps by Historycentral.com Inc - [Finance Formulator](https://appshunter.io/ios/app/finance-formulator/id294194640) - [Personal Formulator](https://appshunter.io/ios/app/personal-formulator/id296173495) - [Electrical Formulator](https://appshunter.io/ios/app/electrical-formulator/id299749412) - [Plumbing Formulator](https://appshunter.io/ios/app/plumbing-formulator/id303497783) - [Carpentry Formulator](https://appshunter.io/ios/app/carpentry-formulator/id305583131) - [Builder's Formulator](https://appshunter.io/ios/app/builders-formulator/id306247596) All apps by Historycentral.com Inc: https://appshunter.io/developer/1744330560 --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-05.*