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The Bug in Your Pipes: Legionella Water Management Plans · NOXTalks

• 0:07
  SPEAKER_00: Welcome to Knox Talks, the AI-generated podcast exploring the groundbreaking ways technology shapes our built environment.
• 0:14
  SPEAKER_00: Today we're diving into the water problem that never shows up on the dashboard.
• 0:18
  SPEAKER_00: The biological one.
• 0:20
  SPEAKER_00: Leak detection gets the budget, billing gets the reports, but one of the deadliest biological risks in a building's pipes is a bacterium, Legionella, and managing it has quietly moved from best practice to legal mandate in a growing list of jurisdictions.
• 0:36
  SPEAKER_00: Outside the heavily regulated sectors, adoption is still uneven.
• 0:40
  SPEAKER_00: And in many buildings, the monitoring to show a plan is working just isn't there.
• 0:46
  SPEAKER_00: First, the scale.
• 0:47
  SPEAKER_00: According to the CDC, reported case counts of Legionnaires' disease in the U.S.
• 0:52
  SPEAKER_00: grew nearly nine times between 2000 and 2018.
• 0:56
  SPEAKER_00: It's fatal for roughly one in ten and about one in four when it's picked up in a healthcare facility.
• 1:01
  SPEAKER_00: And here's what should stop you cold.
• 1:04
  SPEAKER_00: When the CDC investigated outbreaks, nine in ten involve problems effective water management could have prevented.
• 1:10
  SPEAKER_00: Nine in ten.
• 1:11
  SPEAKER_00: This isn't an active nature risk, it's an operations risk.
• 1:15
  SPEAKER_00: And the bacteria's needs map directly onto building systems.
• 1:19
  SPEAKER_00: Legionella grows best in water between 77 and 113 degrees Fahrenheit, which is exactly where lukewarm domestic hot water, dead legs, and underloaded loops like to sit.
• 1:32
  SPEAKER_00: Stagnation is the amplifier, which is why hybrid work can make this worse.
• 1:36
  SPEAKER_00: Floors that used to flush themselves through daily use now sit idle.
• 1:41
  SPEAKER_00: Showers nobody runs.
• 1:43
  SPEAKER_00: Fixtures nobody opens.
• 1:45
  SPEAKER_00: Every quiet Friday creates another little window for growth.
• 1:49
  SPEAKER_00: So what does compliance look like?
• 1:51
  SPEAKER_00: The framework is Ashray Standard 188, the Water Management Plan Standard.
• 1:57
  SPEAKER_00: It requires a designated team, a mapped system, hazard analysis, control limits, monitoring, corrective actions, and critically documentation.
• 2:08
  SPEAKER_00: Its newer sibling, Ashray 514, published in 2023, covers physical, chemical, and microbial hazards beyond Legionella.
• 2:18
  SPEAKER_00: While pointing back to 188 for Legionella, Ashray Guideline 12, updated the same year, provides the practical how-to.
• 2:27
  SPEAKER_00: For healthcare, this stopped being optional years ago.
• 2:31
  SPEAKER_00: CMS put water management firmly into the healthcare compliance framework in 2017.
• 2:37
  SPEAKER_00: Medicare-certified hospitals and long-term care facilities are expected to manage Legionella risk through documented policies and procedures.
• 2:45
  SPEAKER_00: And deficiencies can be cited under its infection control requirements, and states are adding teeth.
• 2:51
  SPEAKER_00: New Jersey's law covers hospitals and care facilities, buildings with cooling towers, spas and fountains, residential buildings of six or more floors with central hot water, and hotels where central hot water systems serve 25 or more units.
• 3:08
  SPEAKER_00: That deadline is almost here.
• 3:09
  SPEAKER_00: The law took effect September 12th, 2024, so written programs are due September 12, 2026, with procedures fully implemented by December 12th.
• 3:20
  SPEAKER_00: And once implemented, the program and its records must be kept for at least five years.
• 3:26
  SPEAKER_00: Here's the controls hook.
• 3:28
  SPEAKER_00: A BAS can't replace a water management program, but it can automate and document a large part of the monitoring that makes one work.
• 3:37
  SPEAKER_00: Domestic hot water supply and return temperatures?
• 3:40
  SPEAKER_00: Trend them continuously in alarm deviations.
• 3:43
  SPEAKER_00: Cooling tower treatment, conductivity, blowdown, and treatment system status can all feed the BAS.
• 3:50
  SPEAKER_00: Stagnation?
• 3:52
  SPEAKER_00: Flow meters and fixture use data can identify low-use branches and help trigger planned flushing.
• 3:58
  SPEAKER_00: The same trend infrastructure used to demonstrate energy performance can provide time-stamped evidence that critical water control parameters were monitored and maintained.
• 4:08
  SPEAKER_00: A paper binder of handwritten readings is a 1995 strategy.
• 4:13
  SPEAKER_00: Much of this monitoring is exactly the kind of job the BAS already knows how to do.
• 4:18
  SPEAKER_00: Three practical moves.
• 4:20
  SPEAKER_00: One, confirm whether your building type is already mandated.
• 4:23
  SPEAKER_00: Healthcare, cooling towers, at-risk populations.
• 4:28
  SPEAKER_00: If that's you, assemble the team now.
• 4:30
  SPEAKER_00: Two, map where water can stagnate or enter favorable growth conditions, then identify the control points and monitoring strategy for those locations.
• 4:39
  SPEAKER_00: 3.
• 4:40
  SPEAKER_00: Start record keeping the moment the program goes live.
• 4:43
  SPEAKER_00: A water management program isn't just the document, it's the evidence that control measures were monitored, deviations were caught, and corrective actions were taken.
• 4:53
  SPEAKER_00: One last thought.
• 5:10
  SPEAKER_00: Many buildings already have much of the sensing, control, and trend infrastructure needed to do this.
• 5:16
  SPEAKER_00: What's missing, more often than not, is the plan.
• 5:19
  SPEAKER_00: And when nine out of ten investigated outbreaks involved problems, better water management could have prevented, a written plan isn't paperwork.
• 5:27
  SPEAKER_00: It's the difference between a maintenance record and an incident report.