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The core topics of the entry-level water treatment operator exam, each on one drawn page, with the math worked step by step

How to study the whole plant from intake to tap without rereading dense manual chapters or guessing which number goes where in the formula

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64illustrated topics, one per page
9parts, intake to tap
2free bonus books included
PDFby email, ready to print

Take a look inside the book

Built to read on your phone at the plant, on a tablet at the kitchen table, or printed and kept by the bench.

Surface water: filtration + disinfection. Groundwater: often disinfection only, under the Groundwater Rule.
Surface water: filtration + disinfection. Groundwater: often disinfection only, under the Groundwater Rule.
3 × 2 ft channel at 2 ft/s = 12 cfs = 5,386 gpm = 7.76 MGD.
3 × 2 ft channel at 2 ft/s = 12 cfs = 5,386 gpm = 7.76 MGD.
2.5 mg/L × 4 MGD × 8.34 = 83.4 lb/day of chlorine.
2.5 mg/L × 4 MGD × 8.34 = 83.4 lb/day of chlorine.
Coagulation: seconds, fast, neutralize. Flocculation: 20–30 min, slow, build floc.
Coagulation: seconds, fast, neutralize. Flocculation: 20–30 min, slow, build floc.
CT = mg/L × T10 minutes; T10 = detention time × baffling factor from 0.1 to 1.0.
CT = mg/L × T10 minutes; T10 = detention time × baffling factor from 0.1 to 1.0.
500 gpm × 120 ft ÷ 3,960 = 15.2 whp, then divide by pump and motor efficiency.
500 gpm × 120 ft ÷ 3,960 = 15.2 whp, then divide by pump and motor efficiency.
Tier 1 in 24 hours, Tier 2 in 30 days, Tier 3 in a year; CCR by July 1.
Tier 1 in 24 hours, Tier 2 in 30 days, Tier 3 in a year; CCR by July 1.

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You studied it. The manual just never drew it on the plant.

You read the chapter on coagulation. Then the chapter on flocculation. By the next morning they've blended into one thing. Because the manual describes them in paragraphs, not side by side.

You know the pounds formula. mg/L times MGD times 8.34. But the problem gives you gallons per minute and percent strength, and suddenly you don't know which number goes where.

pH, alkalinity, hardness. Three words, three definitions, three tests. You study them separately and they mix together every single time.

Coagulation: seconds, fast, neutralize. Flocculation: 20–30 min, slow, build floc.

This page puts coagulation and flocculation side by side on the same drawing. Flash mix on the left: seconds, high speed, charge neutralization. Slow mix on the right: twenty to thirty minutes, gentle paddles, floc building up.

Two processes, one page. You see where each one happens in the plant, what it does to the particle, and why the order matters.

When it's drawn where it happens, you stop confusing it.

COMPARE

The same topic, studied two ways

INSTEAD OF THIS
  • Read a paragraph about CT, then flip back to find the formula on a different page
  • Try to memorize that T10 uses a baffling factor without seeing the basin
  • Hope you remember which number is concentration and which is time on exam day
CT value is calculated as the product of the disinfectant residual concentration in mg/L (measured at a point before or at the first customer) multiplied by the contact time in minutes (T10), where T10 represents the time it takes for 10 percent of the water to pass through the contact basin, and is determined by multiplying the theoretical detention time by the baffling factor, which ranges from 0.1 for an unbaffled basin to 1.0 for a perfect plug-flow configuration, and the required CT varies by disinfectant type, temperature, pH, and target pathogen inactivation level.
CHOOSE THIS
  • See CT drawn on the contact basin: the pipe in, the baffles, the pipe out
  • The baffling factor is labeled right on the drawing, from 0.1 to 1.0
  • The formula sits next to the basin it describes, with every number labeled
CT = mg/L × T10 minutes; T10 = detention time × baffling factor from 0.1 to 1.0.
CONTENTS

Take a look: 9 parts, 64 topics

Nine parts follow the water from the source to the tap. Every formula sits next to the basin, filter, or pump it describes.

IThe Plant from Intake to Tap · pp. 5-10
  1. How to Use This Book
  2. Your Exam: Grades, Names and States
  3. The Whole Plant on One Page
  4. Surface Water vs. Groundwater Systems
  5. Why We Treat: The Multiple-Barrier Idea
  6. What an Operator Actually Does in a Shift
IIWater Math in 4 Steps · pp. 11-19
  1. The 4 Steps, Always in the Same Order
  2. Units and Conversions You Need
  3. Area of Rectangles and Circles
  4. Volume of Tanks, Basins and Pipes
  5. Flow: Q = A × V
  6. The Pounds Formula: mg/L × MGD × 8.34
  7. Percent Strength and Solution Feed
  8. Detention Time
  9. Pressure and Head: 2.31 and 0.433
IIISource Water and Pretreatment · pp. 20-26
  1. Watersheds, Reservoirs and Wells
  2. Source Water Protection
  3. Intakes, Screens and Grit
  4. Reservoir Turnover and Algae
  5. Pre-Oxidation and Taste and Odor
  6. Iron and Manganese Removal
  7. Well Basics: Casing, Screen and Drawdown
IVCoagulation, Flocculation and Settling · pp. 27-33
  1. Why Particles Won't Settle on Their Own
  2. Coagulation: The Flash Mix
  3. Flocculation: The Slow Mix
  4. Coagulation vs. Flocculation, Side by Side
  5. Jar Testing to Pick the Dose
  6. Sedimentation Basins
  7. Sludge Handling
VFiltration · pp. 34-39
  1. Inside a Rapid Sand Filter
  2. Filter Loading Rate
  3. Head Loss and When to Backwash
  4. The Backwash Sequence
  5. Turbidity: The Filter's Report Card
  6. Mudballs, Cracks and Air Binding
VIDisinfection · pp. 40-47
  1. Why We Disinfect: Pathogens in Three Groups
  2. Dose, Demand and Residual
  3. Free, Combined and Total Chlorine
  4. Breakpoint Chlorination
  5. CT: Concentration × Time
  6. Gas Chlorine vs. Hypochlorite
  7. Chlorine Gas Safety
  8. Residual Rules and Disinfection Byproducts
VIIpH, Alkalinity, Hardness and Corrosion · pp. 48-54
  1. pH, Alkalinity and Hardness, Side by Side
  2. The pH Scale
  3. Alkalinity: The Water's Buffer
  4. Hardness: Calcium and Magnesium
  5. Softening: Lime and Ion Exchange
  6. Corrosion Control
  7. Fluoridation
VIIIPumps, Distribution, Safety and Lab · pp. 55-61
  1. Storage Tanks and Pressure Zones
  2. Mains, Valves and Hydrants
  3. Cross-Connections and Backflow
  4. Centrifugal Pumps and Horsepower
  5. Lockout/Tagout and Confined Spaces
  6. Sampling for Coliform Bacteria
  7. Lab Basics: Grab vs. Composite and Hold Times
IXFederal Rules and Your Exam Review · pp. 62-68
  1. The Safe Drinking Water Act in One Page
  2. The Rules You'll See on the Exam
  3. Lead and Copper Sampling
  4. Public Notification and Records
  5. The Formula Sheet, Drawn
  6. Math Mistakes That Cost Points
  7. Exam Day Checklist

Each page is one stop on the plant.

Every page has one idea, drawn where it happens in the plant. The formula is right there, on the equipment. No flipping back. No hunting for the right chapter.

500 gpm × 120 ft ÷ 3,960 = 15.2 whp, then divide by pump and motor efficiency.

This page shows a centrifugal pump with every part labeled: the impeller, the volute, the suction and discharge. The horsepower formula sits on the pump itself: 500 gpm × 120 feet of head ÷ 3,960 = about 15 water horsepower. You see each number and where it comes from.

Below the drawing, the problem is worked out step by step: pick the formula, label each number, convert the units, solve. Every math page follows that routine.

Find the pump, and the formula is already on it.

What's inside Water Treatment, Drawn on the Plant

Ipp. 5-10

The Plant from Intake to Tap

The plant from intake to tap: how the whole system works, what an operator does, and how exam grades vary by state.

IIpp. 11-19

Water Math in 4 Steps

Water math with a 4-step routine: area, volume, flow, pounds, detention time, pressure and head.

IIIpp. 20-26

Source Water and Pretreatment

Source water and pretreatment: watersheds, wells, intakes, screens, algae, iron and manganese.

IVpp. 27-33

Coagulation, Flocculation and Settling

Coagulation, flocculation and settling: flash mix, slow mix, jar testing and sedimentation, drawn side by side.

Vpp. 34-39

Filtration

Filtration: rapid sand filters, loading rate, head loss, backwash sequence, turbidity and common filter problems.

VIpp. 40-47

Disinfection

Disinfection: dose, demand, residual, breakpoint, CT, gas chlorine vs. hypochlorite, and safety.

VIIpp. 48-54

pH, Alkalinity, Hardness and Corrosion

pH, alkalinity, hardness and corrosion: the three concepts side by side, softening, corrosion control and fluoridation.

VIIIpp. 55-61

Pumps, Distribution, Safety and Lab

Pumps, distribution, safety and lab: storage tanks, mains, cross-connections, centrifugal pumps, lockout/tagout and sampling.

IXpp. 62-68

Federal Rules and Your Exam Review

Federal rules and exam review: the Safe Drinking Water Act, lead and copper, public notice, the formula sheet drawn, and your exam day checklist.

Plus, 2 free books come with it

The Practice Shift: Original Questions by Plant Area

GIFT 1: «The Practice Shift: Original Questions by Plant Area»

Bought separately: US$ 17.90

Check yourself area by area with original practice questions, each answer explained on the same drawing you studied.

The Mix-Up Pages: Common Errors and Review Cards

GIFT 2: «The Mix-Up Pages: Common Errors and Review Cards»

Bought separately: US$ 14.90

See side by side the concepts that most often get confused, and review the whole plant in short cards the week before your exam.

Your bundle: Water Treatment, Drawn on the Plant and 2 gifts

  • Water Treatment, Drawn on the Plant: 64 illustrated pagesUS$ 63
  • GIFT 1: The Practice Shift: Original Questions by Plant AreaUS$ 17.90
  • GIFT 2: The Mix-Up Pages: Common Errors and Review CardsUS$ 14.90
  • High-quality PDF file, ready to printIncluded
Total value US$ 95.80
BUNDLE PRICE
US$ 27
YOU SAVE: US$ 68.80
GET WATER TREATMENT, DRAWN ON THE PLANT · US$ 27

📄 Digital book in PDF: it comes by email. Nothing is shipped on paper.

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PDF by email: You receive Water Treatment, Drawn on the Plant as a PDF in your inbox, along with the 2 free books. You pay once: no installments, no extra charges.

Which operator are you?

You're studying for the entry-level operator exam

You're studying for the entry-level operator exam

You have the manual. You've watched videos. But the math still trips you up and the concepts blur together. You want one book where every topic is drawn and every formula is solved step by step, so you can study it in order and come back to any page.

You already work at a plant and need the certificate

You already work at a plant and need the certificate

You run the equipment every day, but the exam asks about it in different terms. You want to match what you already know at work to what shows up on the test, without reading five hundred pages of textbook.

You're entering the water field from another trade

You're entering the water field from another trade

You come from maintenance, construction, or another hands-on job. You learn by seeing, not by reading paragraphs. You want to know what the whole plant looks like before you sit for the test.

Everything your purchase includes

US$ 95.80US$ 27
GET WATER TREATMENT, DRAWN ON THE PLANT · US$ 27

📄 Digital book in PDF: it comes by email. Nothing is shipped on paper.

30DAYS
GUARANTEE

30 days to try it

30-day money-back guarantee. Study it, use it at your plant, try the practice questions. If it didn't help you understand the topics or the math, tell us what didn't work and we'll refund 100%.

Common questions

Is this a printed book or a digital file?

It's a digital PDF. You receive it by email and you can print it at home or at a print shop.

Can I read it on my phone?

Yes. Every page is designed to be readable on a phone screen. It also looks great on a tablet or printed on paper.

Does it cover my state's exam?

The book covers topics and math based on EPA federal rules and the Need-to-Know Criteria published by WPI (formerly ABC). Many states reference those criteria for their entry-level drinking water operator exam, but each state writes or selects its own test, sets its own grade names (Grade 1, Class D, Small System, etc.) and may require stricter limits than the federal figures shown here. Check with your state drinking water certification agency to confirm what your exam covers before you sit for it.

I haven't done math in twenty years. Does it start from zero?

Yes. Part II starts with units and conversions, then area, volume and flow, before any treatment formula. Every problem is solved in four labeled steps. Nothing is skipped.

Is this official? Does it give me a certificate or CEUs?

No. This is an independent illustrated study guide. It does not give you a certificate, a license or continuing education credits (CEUs): your certificate comes only from passing your state's exam. It is not affiliated with or endorsed by WPI (formerly ABC), AWWA, or the EPA. The content follows publicly available federal rules and widely published operator training criteria.

Does this replace an operator training course?

No. It's a study companion. It helps you understand and review the topics, but it does not replace the hands-on training or coursework your state may require for certification.

How do I receive the material?

You get the book and the two bonus books as PDF files, sent to the email address you enter at checkout.

Is it a one-time payment?

Yes. You pay once and you keep the files. No subscription, no recurring charge.

Are the practice questions real exam questions?

No. We wrote every question ourselves to check one plant area at a time. None come from a state, WPI or ABC exam bank.

Before you close this page

Your shelf already has the five-hundred-page manual.

You need to open a page, see the drawing, read the formula, and know which number goes where.

That's what this book does. Sixty-four topics, drawn on the plant, from intake to tap.

The exam has a date. The book is ready. Grab it and study the plant the way it actually looks.

US$ 27, paid once · 30-day guarantee · PDF by email

GET WATER TREATMENT, DRAWN ON THE PLANT · US$ 27

📄 Digital book in PDF: it comes by email. Nothing is shipped on paper.