Paving the Way for Sustainable Drinking Water Supply in Arizona

The Arizona Department of Environmental Quality (ADEQ) has announced the approval of the Advanced Water Purification (AWP) rules by the Governor’s Regulatory Review Council. This new regulatory framework aims to ensure a sustainable and reliable drinking water supply for Arizona communities amid rising demand and drought conditions. The AWP program allows cities and water providers to apply for permits to purify treated water for potable use, incorporating strict safeguards to protect public health. 

“Water reliability is the foundation of a thriving community, and the approval of these rules paves the way for new opportunities to strengthen our supply,” said Phoenix Water Services Director Troy Hayes. “Phoenix is prepared to integrate advanced water purification into our long-term strategy, reinforcing our commitment to sustainability and resilience.”

Key Requirements Include:

• Initial Source Water Characterization
  • Initially identifying all problem constituents in the treated wastewater source.
• Pathogen Control
  • Mandatory removal well above the 99 percentile.
• Site-Specific or Custom Chemical Control
  • A robust and apt approach based on the Initial Source Water Characterization.
• Enhanced Source Control
  • Chemical Control at the pollutant’s source, if necessary.
• Rigorous Minimum Design Criteria
  • Tailored to the findings of the Initial Source Water Characterization.

The approval follows extensive public engagement and technical reviews, with major cities like Phoenix and Scottsdale actively supporting the initiative. The press release states that "the new rule outlines the technical and operational requirements for AWP systems, drawing on best practices, input from the ADEQ-formed external Technical Advisory Group, and feedback on both ADEQ’s AWP Proposed Program Roadmap and Rule." The AWP rules took effect on March 4, 2025, and will be published in the Arizona Administrative Register soon.

Further Resources...

• AWP Overview | View >
• AWP Infographic | View >
• AWP Fact Sheet | View >
• Securing our Water Future Through AWP | View AMWUA Blog > 

Read the full press release: Advanced Water Purification (AWP) Approved | ADEQ
 

Wastewater System Sustainability Practices | Recorded on November 12, 2024

In this recording of our recent live webinar "Wastewater System Sustainability Practices" viewers will discover some of the most helpful resources for wastewater system sustainability practices and learn how to use our search tools at WaterOperator.org to find additional resources and training events.

This webinar series from WaterOperator.org covers topics relevant to wastewater operators, including funding, asset management, compliance, and water quality. Certificates of attendance will be delivered upon request to live attendees but are not available for watching this replay.

Water Reuse for Sustainability

Water reuse is recycling treated wastewater for beneficial purposes such as agricultural and landscape irrigation, industrial processes, toilet flushing, and replenishing a ground water basin (aka ground water recharge.) Water recycling offers resource and financial savings, but there are concerns that some chemicals, like pharmaceuticals, may remain in treated water.

We have 328 resources (and counting) on Water Reuse in our Documents Database that provide valuable information on this topic. You can search for documents on constructed wetlands for greywater recycling and reuse, a list of common terms used when discussing water reuse, potable reuse to diversify water supplies, and many other useful guides that will help you to provide excellent service to utility customers.

To access the wealth of knowledge on Water Reuse within our database just select "CATEGORY" in the dropdown then choose "Water Reuse." Once you make that selection, a second dropdown will appear where you can choose "HOST," “TYPE,” or “STATE” to narrow the search even further. If you have a specific search term in mind, use the “Keyword Filter” search bar on the right side of the screen.

This is part of our A-Z for Operators series.

Water Rights for Cash in Nevada

Many landowners all over the state of Nevada are choosing to surrender their water rights​ in exchange for cash payments. The constant drought conditions combined with over pumping have depleted the groundwater that communities depend on, and many landowners have made the decision to sell their water rights rather than drilling a new well or extending an existing well. 

The Voluntary Water Rights Retirement Program​ was allocated $25 million in funding and was created to purchase groundwater rights from private landowners in over-pumped, over-appropriated basins in several Nevada communities. The Central Nevada Regional Water Authority​ is an agency that proactively addresses water resource issues in this region, and they report that there are "25 over-appropriated groundwater basins, eight of which are also over-pumped."

As of May 2024, the program has "received commitments to retire more than 25,000 acre-feet of groundwater annually...which is about the average amount of water in both the Boca Reservoir and Donner Lake any given year." Water regulators have until September 2024 to enter into contracts and acquire water rights.

Most of the funding will likely go to Diamond Valley, NV which is the state's only "critical management area." This means that "the valley’s groundwater levels are rapidly declining, and groundwater rights holders in the area are required to create a plan to address over-pumping or risk losing their rights...If all sales go through, the state expects to retire about 30% of the annual groundwater yield in Diamond Valley," said Jeff Fontaine, Executive Director of the Central Nevada Regional Water Authority and the Humboldt River Basin Water Authority.

Due to the success of this limited program, water managers and conservation groups in the state have expressed the need to make Voluntary Water Rights Retirement a permanent, statewide program. 

Learning Lessons from Supply Chain Disruption

One of the most prominent economic impacts to emerge from the COVID-19 pandemic was the breakdown of supply chains for many consumer, medical, and industrial products. Though the shortages of goods such as toilet paper, semiconductor chips, personal protective equipment and more made widespread headlines, the range of items affected spread much wider — including to the supply of critical water treatment chemicals. The American Water Works Association found in November 2021 that 45% of surveyed water utilities were experiencing shortages of water treatment chemicals, among other staffing and supply issues. 

Shortages of chlorine did make news in the summers of 2021 and 2022 due to the difficulty pool-owners had obtaining it to clean their pool water, but the threat it posed to water utilities — where chlorine is a critical component of the treatment and disinfection process — was much less widely known. In 2021, the pandemic spurred the shortage by causing a decrease in production capacity, an increase in demand (largely from a boom of newly-installed pools), and other logistical failures. However, non-COVID factors also played a role in the shortages.

Hurricane Laura, which struck Louisiana in August 2020, severely damaged the BioLab Inc. chemical plant, a major US producer of chlorine. In 2022, the labor dispute between rail workers and rail companies briefly led to an embargo on the rail transport of hazardous materials including chlorine and other water treatment chemicals. While further major disruptions did not occur in 2023, the EPA considers the chlorine supply chain to be “vulnerable to periods of reduced product allocation and/or price increases” and maintains a page tracking the status of chlorine availability and pricing. 

The most severe supply chain disruption in 2023 for water treatment chemicals came right at the start of the year — when a four-alarm fire devastated the Carus Chemical factory in LaSalle, Illinois, on January 11. Carus is the only producer of potassium permanganate in North America, which is used to oxidize contaminants in drinking water. While the company initially warned of  a 3-month outage in its production capacity, potassium permanganate production did not resume at Carus until August. Luckily, overseas imports were able to fill demand after some initial shortages, and the EPA found that supply had stabilized by May.

Other water treatment chemical supply chains that the EPA considered to be disrupted since 2020 include carbon dioxide, sodium hydroxide and hypochlorite, hydrochloric acid, ferric and ferrous chloride, oxygen, and fluorosilicic acid. However, none of these disruptions are considered to be ongoing.

While supply chains of water treatment chemicals have always been susceptible to periods of economic strain, such as the Great Recession of 2007-09, COVID-19 revealed many more risks in the system. According to the EPA’s “Understanding Water Treatment Chemical Supply Chains” report:  

“The supply disruptions that have occurred during the pandemic era revealed a range and intensity of supply chains stressors that had not previously been observed in such a short timeframe. While high-impact events such as a pandemic or repeated extreme weather events concentrated on industrial hubs may have been considered low-probability in previous assessments, supply chain risk planning may have to consider greater frequency and co-occurrence of such high-impact events.”

The most prevalent long-standing threats to the stability of supply chains include natural disasters, equipment failures, logistical problems such as transportation delays, and malicious acts like cyberattacks and sabotage — none of which will stop being a concern even as the pandemic is increasingly behind us. International markets can also be severely affected by trade barriers, armed conflicts, and natural disasters. 

Perhaps the most prominent chemical shortage preceding 2020 was a national shortage of chlorine in 1974. While a single cause of the shortage could not be identified, New York Times reporting at the time cited the new requirement to chlorinate wastewater, the closure of production facilities, and the energy crisis of the 1970s (which was peaking with the 1973-74 oil shock) as likely factors.

For more information on the supply chain history of various water treatment chemicals, the EPA’s supply chain profiles of 46 commonly used chemicals contains shortage histories for 2000-2022, as well as risk profiles for shortages of each chemical. Risk ratings for these chemicals can also be found in the “Understanding Water Treatment Chemical Supply Chains” report.

As for future concerns, chlorine availability could continue to be made vulnerable by natural disasters in the Gulf Coast region. 33% of American chlor-alkali facilities, in which most chlorine is produced, are located along the Gulf Coast, which is both historically prone to hurricanes and under greater threat as climate change intensifies storms. Disruptions in chlorine supply also lead to disruptions in ferric chloride supply, which requires hydrochloric acid. 

The EPA has many resources to assist in preparing for and responding to supply chain challenges. The critical steps to prepare are:

1. Using federal and state support programs for operational efficiency and cost reduction
2. Management of supplier relationships
3. Coordinating with other utilities, state and local agencies, and water sector associations
4. Instituting operational flexibilities 

To respond to disruptions, the EPA recommends:

1. Seeking federal support
2. Communicating with suppliers
3. Coordinating with partners

Follow the Supply Chain Resilience Guide for more information, instructions, and tips to prepare and respond.  

More information, tools, and links from the EPA: 

• Current Supply Chain Disruptions
• Platform for Coordinating Supply Chain Efforts
• Chemical Suppliers and Manufacturers Locator Tool
• Supply Chain Case Studies
• Water Treatment Chemical Supply Chain Profiles
• Understanding Water Treatment Chemical Supply Chains and the Risk of Disruptions
• Supply Chain Resilience Guide for Water and Wastewater Utilities
   

Elevating Women in Water

Contributed by Margaret Golden

Women make up over half of the population, but account for less than 20% of workers in the water industry. The work that women contribute to the water industry is necessary and important, offering valuable insight to bring the industry into the future.

With a new generation of workers on the rise, it is important that women feel empowered to work in the water. Brianna Huber, chemist with the City of East Moline, is on a mission to not only recruit women into the industry but see equity in their opportunities. Her non-profit, Her2O, is currently seeking members who are ready to forge lasting change.

Women across the country are already making great impacts, breaking glass ceilings and blazing their path to the top of the water world. Two leaders in the water industry recently discussed what it means to them to be a woman in the water industry.

Newsha Ajami, the Director of Urban Water Policy at Water in the West at Stanford University, discussed in a podcast what we need to do to transition to 21st century sustainable water management. Michelle Harrison talked about her favorite parts about working as a wastewater treatment operator at the Northwestern Water & Sewer District.

Many organizations take the time to specifically acknowledge the women in their work place during women's history month. Last spring the U.S. EPA highlighted Sandhya Parshionikar, Director of the Water Infrastructure Division, Center for Environmental Solutions and Emergency Response. Rural Communities Assistant Partnership highlighted Ines Polonius, CEO of Communities Unlimited.

Cuyamaca College in El Cajon also hosts an annual symposium dedicated to Women in Water.

An EPA Guide for Climate Resiliency Planning

Many utilities are developing plans to increase short-term and long-term climate resiliency in response to extreme weather events, changing water availability, or the risk and resiliency assessment requirements set forth in the America’s Water Infrastructure Act of 2018 (AWIA). To assist in the early developmental stages of resiliency planning, the EPA's CRWU program designed the Resilient Strategies Guide for Water Utilities. This online application prompts utilities with a series of questions about their system and its resiliency concerns to provide recommend strategies that will decrease vulnerability. This web application was updated in August 2019 to allow utilities to specify their system size and find funding sources for the projects they want to pursue.

Both water and wastewater systems can use the tool. The foundation of the guide is built using the CRWU Adaptation Strategies for Climate Change and a funding list maintained by the Water Finance Clearinghouse. Completing the guide takes roughly 20 minutes. After answering a series of questions that identify your system type, size, location, assets, preferred resiliency strategies, and funding interests, the application will produce a report that can be used as a starting point to develop a more complex plan.

Once the guide is launched, you will start by answering questions about your facility and its resiliency priorities. The priorities indicate the concerns that your system wants to address. You can filter the list of priorities in the left hand menu to narrow your focus to topics such as drought preparation, flood protection, energy efficiency, etc. The ‘More Info’ button will elaborate on any option you're considering. Once you’ve selected your priorities, you’ll indicate what assets are present within your system. From there you can select your preferred planning strategies that have been suggested based on your previous answers. Filter the strategies with the left hand menu to narrow down your options by cost or category. For example, if you want to exclude strategies that require new construction, you could check the ‘repair & retrofit’ category instead. The last section recommends potential funding sources that might assist with the strategies you've selected earlier.

The strategies and funding sources will be used to generate the final report. Continue to the end and select ‘Generate Report’. This report will include a detailed summary of your answers, contact information for any funding sources you've selected, and case studies relevant to your utility. To save a copy of the report you will have to copy and paste the results into a Word document. If you have a CREAT account, you can select ‘Export CREAT File’ to download a file that can be imported into your CREAT account’s existing analysis. CREAT (Climate Resilience Evaluation and Awareness Tool) is a more in-depth risk assessment and planning tool that can be used once you've done your initial research. You can preview the CREAT tool framework with their guide here.

Featured Video: Drought Response and Recovery in the Town of Castine, ME

This week's featured video tells the story of how  the small town of Castine, ME headed off recent drought and infrastructure challenges - a story that may be adaptable to other small systems nationwide. This video is featured on the USEPA's Drought Response and Recovery StoryMap Project for Water Utilities (ArcGIS) and is included as a case study resource in their recently updated Drought Response and Recovery Guide for Water Utilities guide. 

Featured Video: The Future of Water

Water is a scarce resource for many communities around the globe, and this scarcity is becoming more and more widespread. Our featured video this week from Quartz Media looks out how one locality half a world away has addressed this challenge, and how the rest of us can learn from systems like these where the "future of water" has already arrived.

While this video focuses on a larger metropolitan area, there are some interesting takeaways for smaller systems as well such as:

•  Solutions to water challenges are best solved at the individual and/or community level. 
•  Water reuse is most likely already happening in your community and efforts can be made to change public perceptions. For example, a wastewater pipe enters the Mississippi River every 8 miles - meaning almost every community using the river as a water source is already drinking someone else's wastewater!     

Solving the Rural Water Crisis