2025-12-22 – Weekly Water Treatment News : PFAS sampling SOP discussion

Last week on the forum, discussions revolved around the challenges and innovations in water treatment processes. Members delved into the intricacies of PFAS sampling methods, focusing on creating robust SOPs that withstand scrutiny. There was also a strong interest in how inline UV254 probes can enhance SUVA control, sparking conversations about real-world applications. Additionally, the need for continuing education units (CEUs) to stay updated on PFAS and LCRI developments was a recurring theme.


This Week’s Hot Topics

PFAS sampling SOP that passes scrutiny
The community has been exchanging ideas on how to refine PFAS sampling procedures to meet stringent standards. This is a crucial topic for anyone involved in environmental compliance.
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Inline UV254 probes for SUVA control
A discussion on the application of UV254 probes in monitoring SUVA levels is gaining traction. It’s a great read if you’re interested in optimizing water quality monitoring.
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Need CEUs for PFAS and LCRI
Professionals are sharing resources and tips for obtaining CEUs focused on PFAS and the Lead and Copper Rule Improvements (LCRI). Essential if you’re looking to further your expertise.
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Pre-dawn turbidity blips in distribution
There’s an intriguing thread about unexpected turbidity changes in distribution systems during early hours. Might be worth checking out if you’ve faced similar issues.
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CEU recommendations for data-driven contamination control
Members are compiling recommendations for CEU courses that focus on data analysis for contamination control. Perfect if you’re aiming to bolster your analytical skills.
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The tool that never lets you down
Users are discussing their go-to tools in water treatment, sharing what works best in various scenarios. Always useful to get insights from peers.
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When turbidity drops but HPC rises
A puzzling situation where turbidity levels decrease yet heterotrophic plate counts rise has prompted an engaging conversation. Check it out if you enjoy problem-solving.
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Best CEU courses for PFAS data QA
There’s a great list forming of recommended CEU courses focusing on quality assurance for PFAS data. A must-read if you’re involved in data quality.
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Looking forward to another productive week of learning and sharing. See you on the forum!

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We saw spurious hits disappear after banning PTFE‑lined caps and waterproof field books β€” HDPE caps only, pencil on labels, and a trip blank per cooler (EPA guidance: https://www.epa.gov/pfas/pfas-sampling-guidance). PFAS loves to hitchhike like glitter, so we change nitrile gloves every bottle and keep sample gear double‑bagged until use. On SUVA, inline UV254 works well but fouling can fake spikes; a quick daily wipe and a weekly check against the bench UV254 keeps the control loop honest.

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Quick win: weekly acid-rinse on inline UV254 steadied SUVA; for PFAS, enforce β€˜no fluorinated apparel,’ @Marina.

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Added an equipment rinse blank for PFAS when reusing tubing; β€˜change gloves between bottles,’ @Guide β€” same-day cold ship helped.

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Biggest PFAS false-positive we chased was from our own β€˜blue ice’ packs; we switched to frozen DI in HDPE bottles and a dedicated PFAS-only cooler, and the noise vanished. Also, sample order matters β€” β€˜PFAS first, VOCs second’ β€” and no sunscreen/bug spray on crew; minor hassle, big payoff.

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