Tag Archives: chlorination

The Pounds Formula

Tomorrow is the big day for those of you taking the Water Distribution Operator certification exam here in California.  (Except for those of you that received a one-week delay.)  Today we conclude our look at the MOST Five — the …
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The Chlorine Revolution

We have often expressed the view that chlorine in drinking water gets a grossly unfair rap in today’s world.  The discovery of disinfection by-products, notably trihalomethanes and haloacetic acids, has been the main factor in forming this picture of chlorine.  …
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Polio: Waterborne Virus

Homo sapiens have enemies.  And we don’t mean science fiction enemies from other planets.  No, right here on Planet Earth, we have other life forms that seek to harm us.  We call these pathogens.  As the dominant species on our …
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Military Water Treatment

We missed the last couple of work days last week to attend a graduation ceremony for my nephew, John.  He is now a Marine!  Congratulations, and Semper Fidelis! A few years ago, we came across a rather interesting portable water …
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Exam Day Is Saturday!

I’m sure you haven’t forgotten, but I’ll remind you anyway: the California Water Treatement Operator certification exam is this Saturday.  We’ve been giving you vocabulary words the last few days, but today I have something a little different.  Expect a …
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Chlorine Breakpoint Curve Course

With less than two weeks to go before the Water Treatment Operator certification exam here in California, we are pleased to announce that we have a new course available here at MOST, WT-7, on Chloramines.  Perhaps no other topic is as confusing …
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Top Ten Chlorine Questions

The Water Treatment Operator certification exam will be three weeks from tomorrow here in California.  Chlorination is probably the topic with the most questions on the exam.  So I am posting a repeat blog for you from about this time …
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Chlorine Math Course Now Available

We have just posted our tenth course here at MOST.  It is on Water Math with Chlorine, which is the most common topic on certification exams.  With the next certification exam here in California just over four weeks away, several …
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New Courses Available

We have recently added two more courses to our list, bringing the total to six.  The first course is available in each of our Distribution, Treatment, Quality, and Math categories.  Each of these is a great introduction to these critical …
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WM 9 – CT Calculations

This course will present the CT Calculation defined by the Surface Water Treatment Rule, using the general formula of CT = Concentration x Time.  Several example problems will be presented, so that the student will be able to understand the …
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WM 7 – Chemical Feed Calculations: Chlorination

This course will show the application of the “Pounds Formula,” Pounds/Day = mg/L x MGD x 8.34, to the chlorination process.  Several example problems will be presented, so that the student will be able to apply this formula to the …
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WT 6 – Chlorination

This course will examine the most common means of chemical disinfection of water supplies, chlorination.  The advantages and disadvantages of chlorination, the chemical options for this process, and operational aspects of chlorination are among the topics addressed.  Approximate length:  1 …
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Chlorine Breakpoint Curve

April 15 is upon us, which means it’s Tax Day in the USA. Make sure you’ve filed your returns! It sounds like we have a slight reprieve until Monday, due to some obscure holiday observed only in Washington D.C. Another …
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Top Ten Chlorine Questions

With the State Treatment Operator exam at the end of the week, it’s a good time to dust off the cobwebs on our chlorine trivia. Chlorination is probably the topic with the most questions on the exam. So here are …
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Chlorine Questions on the Certification Exam

Besides math, no topic presents us with more certification exam questions than chlorine. Why? Because chlorine is still — by far — the most widely used disinfecting chemical for drinking water in the USA. And because disinfection is still — …
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