# Water Treatment Exam Prep 2026 — Chlorine & CT Calculators

> Chlorine & CT Calculators (iPhone/iPad app by Deeun Inc..)

- Source: https://appshunter.io/ios/app/water-treatment-exam-prep-2026/id6761682590 (this page in markdown: same URL + `.md`)
- Developer: [Deeun Inc.](https://appshunter.io/developer/1691824695)
- Category: Education, Utilities
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 17.0 · 6 MB
- Languages: American English
- Released: 2026-04-12
- Data updated: 2026-08-20
- User reviews in markdown: https://appshunter.io/ios/app/water-treatment-exam-prep-2026/id6761682590/reviews.md

## What is Water Treatment Exam Prep 2026?

WATER TREATMENT PREP: CALCULATE. VERIFY. PASS.

The only water operator exam prep app with real plant calculators. Chlorine dosage, CT disinfection, chemical feed rates — tools you'll use every day on the job.

ALL 50 STATES SUPPORTED

Select your state. Get content specific to your certification.

- California SWRCB (D1-D5, T1-T5)
- Texas TCEQ (Class A-D)
- New York DOH (Levels 1A-4A)
- Florida DEP (Class A-C)
- All other states with standard levels

Federal EPA content applies everywhere. State-specific regulations where they matter.

CHLORINE DOSAGE CALCULATOR

The #1 calculation on every exam. The tool you'll use daily at the plant.

Enter:
- Flow rate (MGD, GPM, or GPD)
- Target dose (mg/L)
- Chlorine type (gas, hypo 12.5%, calcium hypo)

Get:
- Pounds per day for gas chlorine
- Gallons per day for liquid hypo
- Step-by-step formula breakdown

lbs/day = MGD × mg/L × 8.34

Never miss a dosage calculation again.

CT DISINFECTION CALCULATOR

EPA requires adequate CT for pathogen inactivation. Calculate and verify.

Enter:
- Disinfectant residual (mg/L)
- Contact time (minutes)
- Temperature and pH

Get:
- CT value achieved
- Required CT for Giardia
- Pass/fail determination
- Log inactivation achieved

CT = Concentration × Time

Know instantly if you're compliant.

CHEMICAL FEED RATE CALCULATOR

Set your feed pumps correctly. Calculate rate from dose and flow.

Works for:
- Sodium hypochlorite
- Alum and polymers
- Fluoride
- Soda ash
- Any chemical with known strength and SG

Output in GPD, GPH, or mL/min. Calculate pump stroke percentage.

FLOW RATE CONVERTER

Water industry uses multiple units. Convert instantly.

- MGD ↔ GPM ↔ GPD
- CFS ↔ GPM ↔ MGD
- Liters per second
- Cubic meters per day

1 MGD = 694.44 GPM = 1.547 CFS

Tap any value, see all conversions.

DETENTION TIME CALCULATOR

Calculate how long water stays in tanks and basins.

Enter tank dimensions. Get volume in gallons and cubic feet. Enter flow rate. Get detention time in minutes and hours.

Works for rectangular tanks, cylindrical tanks, and pipes.

480+ PRACTICE QUESTIONS

Math & Calculations
- Dosage problems with 8.34
- Flow conversions
- Detention time
- Volume calculations

Disinfection
- CT requirements
- Chlorine chemistry
- DBP formation
- UV disinfection

Water Quality
- MCLs for all contaminants
- Sampling requirements
- Test procedures

Treatment Processes
- Coagulation and flocculation
- Sedimentation
- Filtration types
- Process troubleshooting

Plus: Distribution systems, safety, federal regulations, state regulations, operations, laboratory procedures

STATE-SPECIFIC CONTENT

California: SWRCB regulations, Title 22, D/T certification levels
Texas: TCEQ requirements, 30 TAC Chapter 290
New York: DOH regulations, Level 1A-4A system
Florida: DEP rules, Class A-C system
All states: Federal EPA requirements apply

WHO NEEDS THIS APP

- Water treatment plant operators
- Wastewater operators
- Distribution system operators
- Utility workers seeking certification
- Anyone recertifying (every 2-3 years)

175,000 operators nationwide. Aging workforce means constant new operators entering.

FREE TO START

5 questions per day free. Calculators in demo mode.

PRO - TRY FREE FOR 3 DAYS

Start your free trial. Get full access immediately.

Full access includes:
- Unlimited practice questions
- All five calculators
- State-specific content
- Exam simulator
- Progress tracking
- All reference materials

CALCULATE. VERIFY. PASS.

The exam costs $100-200. The tools pay for themselves on your first day at the plant.

This app is for educational purposes only. Certification requirements vary by state. Check with your state certifying agency for specific requirements.

Privacy Policy: https://www.voltexam.com/privacy
Terms & Conditions: https://www.voltexam.com/terms
Terms of Service: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

## Pricing and in-app purchases

Base price: Free.

**Subscriptions**

| Subscription | Price | Period |
| --- | --- | --- |
| Pro - Monthly | $9.99 | per month |

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Pro - Lifetime Access | $24.99 | one-time |



## Version history (last 2 releases)

### 2.0 — 2026-08-18

A big update: a free mock exam, ten new calculations, and a rebuilt CT tool.

TRY IT BEFORE YOU BUY
Take a free 10-question scored mock exam, once a day. Same engine as the full test — flag questions, skip and come back, change your answers — and the same full answer review afterward. You see where you stand before deciding on anything.

REVIEW EVERY ANSWER
After you submit, walk back through the whole exam: what you picked, the correct answer, the explanation, and the standard it comes from. Flagged questions are marked so you can find them fast.

CT DISINFECTION, REBUILT
The tool now works on T10, not theoretical detention time — enter your detention time and pick your basin's baffling condition, and it converts for you. Target log inactivation is selectable and defaults to 3-log. Required CT comes from a lookup table instead of a rough formula.

TEN NEW CALCULATIONS
Pump & Hydraulics — water, brake and motor horsepower, wire-to-water efficiency, total dynamic head, psi to feet of head, well specific capacity.
Filter & Basin Loading — filtration rate, backwash rate, backwash water as a percentage of production, surface loading rate, weir overflow rate.
Water Chemistry — dose equals demand plus residual, two-source blending, percent removal, fluoride feed corrected for purity and available fluoride ion, and the Langelier Saturation Index with a scaling or corrosive reading.

Every calculator shows the formula it used, so you can check the work.

STUDY GUIDES
Five topic guides and six flashcard decks, with spaced repetition that brings a card back right before you'd forget it. Learn, memorize, practice, test.

BOOKMARKS
Tap the bookmark on any question while practicing, then find them all in Settings.

MORE HONEST ABOUT WHAT'S HERE
States with questions written for their specific rules are marked with a star — California, Texas, New York and Florida. Every state gets the full federal and general operator bank: EPA rules, treatment, distribution, math and lab.

ALSO IN THIS UPDATE
An annual plan alongside monthly and lifetime. Daily study reminders. VoiceOver labels on calculator results and study cards. Layout that scales properly at large text sizes. A faster launch, and a fix for a rare startup failure.

### 1.0 — 2026-04-12

No release notes.

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## Related topics

[water treatment exam prep 2026](https://appshunter.io/ios/topics/water-treatment-exam-prep-2026) · [water treatment](https://appshunter.io/ios/topics/water-treatment)

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