This site contains a complete, thorough, and concise review of the mathematical information needed to pass the math portion of introductory-level water treatment operation exams. No information contained on this site is useless or unimportant. Anyone who learns all of the information on this site will be able to answer most or all of the mathematical questions on the mathematical portion of his or her water treatment certification exam.
Please read each post carefully. As you finish studying each page, click on older posts at the bottom of the page to reach the posts on the next page. As you study this site, always remember this: Water treatment facility operator certification board members throughout the United States repeatedly say that almost no one fails an introductory-level water treatment facility operator certification exam if he or she performs well on the math portion of the exam.