1. LawStack
  2. Title 40 - Protection of Environment
  3. Chapter I - ENVIRONMENTAL PROTECTION AGENCY
  4. Subchapter D - WATER PROGRAMS
  5. Part 141 - NATIONAL PRIMARY DRINKING WATER REGULATIONS
  6. Subpart T - Enhanced Filtration and Disinfection—Systems Serving Fewer Than 10,000 People
  7. Topic - Individual Filter Turbidity Requirements
  8. 40 CFR § 141.564
40 CFR § 141.564
My system practices lime softening—is there any special provision regarding my individual filter turbidity monitoring?
June 9, 2020
CFR

If your system utilizes lime softening, you may apply to the State for alternative turbidity exceedance levels for the levels specified in the table in §141.563. You must be able to demonstrate to the State that higher turbidity levels are due to lime carryover only, and not due to degraded filter performance.

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§ 141.563 What follow-up action is my system required to take based on continuous turbidity monitoring?

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