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LATEST CH2M HILL ARTICLES

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Your Next NPDES Permit Won't Look Like Your Last One
More than 5,500 wastewater treatment plant permits expire between 2026 and 2028. Many will be rewritten around nutrients, ammonia, newer water quality standards, and, in some states, PFAS. Here is what the data show, and how to use the 24 months before renewal.  Continue Reading..
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Why One Positive E. coli Sample Put A Pittsburgh Area Community Under A Boil Water Advisory
A single positive sample of E. coli can upend daily routines for an entire community, from what people drink to how they wash dishes, and leave residents wondering how worried they should be. Two environmental engineers explain why E. coli in tap water is a red flag, how boiling kills harmful germs, and how utilities decide the water is safe again.  Continue Reading..
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Selecting Wastewater Blowers For Efficiency And Reliability
Specifying aeration blowers around a single duty point overlooks how flow, pressure, and demand shift over a plant's life. Performance across the full operating envelope shapes efficiency.  Continue Reading..
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Why Direct Chloride Measurement Beats Surrogate Readings For Cooling Water Corrosion Control
Conductivity cannot isolate chloride, the ion most responsible for stainless-steel corrosion. Pairing direct chloride measurement with biological and chemistry parameters gives a fuller view of cooling water risk.  Continue Reading..
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A Water Utility's AI Stop Command Must Reach Every Pending Task
At WEFTEC 2026, Charlotte Water director Angela Charles described a familiar problem: employees worry about AI while utility leaders try to find useful applications. In his October 9 Water Online report, Kevin Westerling explained how Charlotte Water responded with an employee-involved AI framework. The next test of that framework should be operational.  Continue Reading..
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What The Backfill Hides: Why Hold Points Are An Owner's Only Real Window Into A Buried Sewer
Field experience, a comparison of German and U.S. testing practice, and two public records show why the moment of verification matters.  Continue Reading..
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Rethinking Digital Transformation: Connecting Data, People, And Tools For Better Decisions
Digital transformation is reshaping the water sector. Utilities have access to more data than ever before, from work orders to inspection data and real-time monitoring information. The reality is that more data and technology alone do not improve asset management outcomes.  Continue Reading..
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Anaerobic Digestion Provides Energy And Revenue Opportunities At U.S. Water Resource Recovery Facilities
The first comprehensive assessment of anaerobic digestion at U.S. WRRFs in more than a decade highlights the evolution and shows where resources remain untapped.  Continue Reading..
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Emergency Water Main Break Repair: Rapid Response For Small And Mid-Sized Utilities
Emergency water main break repair involves more than fixing a pipe. It requires fast decision-making under pressure, having the right partners ready, and using lessons learned from emergencies to reduce the risk of future ones. In this article, let’s look at how emergency water main break repair works, what to do during an emergency water main break, and how planning and partners help small and mid-sized utilities restore service and...  Continue Reading..
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ICS Cybersecurity 101: Is The Purdue Model Still Enough?
Modern utilities are built on legacy. Pumps, relays, and controllers that once operated in isolation now talk to cloud dashboards, mobile tablets, and vendor service portals. This new reality makes a strong focus on industrial control systems (ICS) cybersecurity absolutely essential. The result is both remarkable efficiency and remarkable exposure, making ICS cybersecurity essential.   Continue Reading..

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National Pump Company Highlights Pump Testing Capabilities In Glendale And Lubbock

National Pump Company (NPC), a recognized market leader in vertical turbine pumps, highlights the testing capabilities available through its Glendale, Arizona, and Lubbock, Texas, test labs. The facilities support a range of vertical pump testing requirements, helping customers to evaluate pump performance and operating characteristics prior to shipment and installation.

Even Substitute PFAS Cause Metabolic Stress In Zebrafish Embryos

PFBS (Perfluorobutanesulfonic acid) exposure leads to genetic, metabolic, and morphological disruptions in zebrafish embryos.

Nitrate Pollution In Rivers Linked To Dry Climates, Not Just Human Activity

Nitrate, a chemical mixture of oxygen and nitrogen often used in farm fertilizers, can rise to toxic levels in surrounding water under very dry conditions. This relationship has traditionally been attributed to agricultural runoff or human waste in the environment, but new research led by scientists at Penn State shows that a hot and dry climate elevates concentrations of nitrate in rivers and streams, even in areas without urban or agricultural development.

Toray Launches Three Advanced Nanofiltration Membranes For Lithium Recovery, Wastewater Reuse, And Offshore Oil Production Applications

Toray Industries, Inc., announced today that it began a phased rollout of three advanced industrial nanofiltration (NF) membrane products in September this year. These are the LXM model for lithium extraction, the HP3 model for high-pressure applications, and the SRM2 model for sulfate removal.

New Pacific Institute Report Shows How Climate Disasters Can Drive Up Water Bills In The US

The report explains how climate disasters can trigger a harmful water affordability feedback loop between utilities and the households they serve, and outlines strategies for water systems, government agencies, technical assistance providers, and communities to break the cycle.

NAWC Statement On Passage Of A Comprehensive Cybersecurity Resolution At NARUC's Annual Meeting

Statement from Robert F. Powelson, President and CEO, National Association of Water Companies (NAWC)