Tag Archives: chlorine

Chlorine and Typhoid

About a month ago we noted a new blog on the water scene from our colleague Michael McGuire.  He has a great post today that we strongly recommend on the history of the use of chlorine for drinking water disinfection.  …
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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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Treatment Exam Deadline Approaches

With the Water Distribution Operator exam now just three weeks away here in California, it’s a bit difficult to focus on anything else.  However, there is a critical deadline approaching for Water Treatment Operators, too.  March 1 is the deadline …
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No More Chlorine Gas?

The wastewater plant in San Jose, California is the latest in a long line of water and wastewater facilities that are abandoning chlorine gas for other forms of this life-saving disinfectant.  Chlorination of drinking water has saved millions of lives …
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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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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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WQ 6 – Disinfectants

This course examines each of the four chemicals approved for drinking water disinfection: chlorine, chloramines, chlorine dioxide, and ozone.  The advantages and disadvantages of each chemical are discussed, as well as the purposes of adding disinfectants.  This course is eligible …
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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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