PHASE Associates provides water quality testing and Legionella risk assessments to help identify bacterial contamination in building water systems, cooling towers, and plumbing networks. Whether you’re responding to a concern or building a proactive monitoring program, we deliver practical guidance, clear reporting, and responsive support backed by decades of EHS and environmental testing experience.
Building water systems are critical infrastructure—and when conditions allow bacteria to grow or water quality is compromised, the impact can go well beyond a routine maintenance issue. Concerns like Legionella, coliform, and E. coli can create health risks for occupants, disrupt operations, and increase liability exposure for building owners and facility teams.
PHASE Associates helps you take a clear, practical approach to water quality testing and Legionella risk evaluation. We help you identify where risk is most likely based on system design and building use, coordinate sampling with minimal disruption, and deliver clear reporting so you can take next steps with confidence.
Our water quality scope can be tailored to your system type, building use, and reason for testing.
Targeted sampling services for domestic water systems, cooling towers, hot water systems, and building water distribution networks, with site-specific risk evaluation and interpretation to help facilities identify potential Legionella exposure hazards and support water management program compliance.
Potable water testing and drinking water quality assessments for commercial, industrial, healthcare, educational, and institutional facilities, including baseline water quality sampling, occupant complaint investigations, pre-occupancy potable water verification, and analysis for bacteria, lead, heavy metals, nitrates, and other regulated contaminants.
Evaluate drinking water sanitary quality, identify potential bacterial contamination, and detect possible impacts from sewage intrusion, surface water infiltration, or compromised plumbing systems.
Rapid testing option commonly used when a faster screening result is needed (often paired with other methods depending on your goal).
Our Legionella-related work is commonly performed as part of Indoor Air Quality (IAQ) and environmental testing services. Depending on your needs, we may support:
If you’re not sure where to sample, we’ll help you develop a practical plan based on system design and building operations.
We’re known for being resourceful, responsive, and detail-oriented—and for taking time to understand your environment before recommending next steps. You can expect:
“PHASE Associates was exactly what we needed when we had concerns about Legionella risk in our building water system. They helped us quickly understand where sampling made sense, coordinated everything with our facilities team, and kept disruption to tenants to a minimum. The communication was excellent—clear expectations, quick answers to questions, and a report that was easy to follow. Most importantly, they translated the results into practical next steps so we weren’t left guessing. Professional, responsive, and extremely knowledgeable.”
– Brandon J
“We hired PHASE Associates for potable water testing after repeated water quality complaints in one area of our facility. They were thorough from the start—asked the right questions, recommended a sensible sampling approach, and handled the process efficiently. Turnaround and follow-up were both strong, and they explained the results in plain language so our leadership team could make decisions quickly. Their recommendations were practical and realistic for an occupied building. Great experience and we’ll use them again.”
– Jim S.
“PHASE Associates supported our team with coliform and E. coli testing and made a stressful situation feel manageable. They were quick to mobilize, very organized during sampling, and provided updates throughout the process. Once results were back, they walked us through what they meant and what actions were appropriate—without overreacting or overselling. The professionalism and attention to detail were top-tier, and we felt confident we were handling the issue correctly. Highly recommend.”
– Cynthia K.
“We needed fast screening results, and PHASE Associates recommended PCR testing as part of our approach. They were responsive, helped us align the testing method with our goals, and kept the project moving without delays. The biggest value was their ability to interpret what PCR results mean in context and how to proceed from there. Clear communication, strong technical expertise, and a very practical mindset. If you need environmental/water testing support, this is the team to call.”
– Robert W.