Report: States look to reuse, desal as long-term water supply options

Recycle-WaterAccording to a new analysis from Bluefield Research, municipal water utilities across the United States have sparked a wave of investment in water reuse and desalination projects exceeding $18 billion.

With traditional water supplies no longer a certainty for many utilities, demonstrated cost declines and competitiveness have been a critical driver to reuse and desalination adoption.

“Without a doubt, California’s five-year drought has been a catalyst for recent project development,” said Bluefield Research Director Erin Bonney Casey. “Utilities as far away as Georgia are seeking ways to mitigate water risk. Utility customers are already facing higher water rates — up 25 percent since 2012 — and the prospect of stabilized water rates is unlikely without more efficient water supply management.”

According to Bluefield’s cost of water analysis, traditional water supplies cost $3.90 per 1,000 gallons (which can be broken down into $2.95/1,000 gallons for transmission and $0.95/1,000 gallons for water rights purchases). Reclaimed water supplies in the United States now cost, on average, $3.60 per 1,000 gallons, falling below that threshold. Seawater desalination plants in the United States supply water for between US$3.03/1,000 gallons and US$8.14/1,000 gallons at an average cost of $5.15 per 1,000 gallons.

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Water reuse — recycling treated wastewater for irrigation and potable needs — continues to gain momentum. So far, 17 states have planned reuse projects in the pipeline exceeding $18 billion in total investment. California and Florida continue to lead reuse development, but planned capacity additions in Hawaii, Georgia, Wyoming, North Dakota, Pennsylvania and Tennessee signal more widespread adoption. Bluefield’s nationwide database of reuse projects has ballooned to 763 projects, highlighting the market’s near-term potential.

In California, which represents 48 percent of planned projects, there is also growing awareness that droughts are cyclical. Even with a strong start to the rainy season in Northern California’s Sierra, dry southern California remains the U.S. epicenter for reuse development and is showing no signs of letting up. The state must look forward and prepare for the next drought.

“The fact that project development is happening in new states shows that that water reuse is no longer just a drought mitigation strategy, but instead a viable option for utilities to boost water supplies,” said says Bonney Casey. “Several years ago, when our project pipeline database was only 135 projects, many were identified as an immediate response to drought, but now that the drought has subsided, we are still coming across new projects aimed at expanding system capacity in the long-term.”

While reuse has emerged as the frontrunner among alternative supplies, utilities continue to evaluate other supply options, such as seawater and brackish water desalination. Desalination costs have declined significantly over the last decade with the introduction of reverse osmosis technology and energy recovery devices; membrane solutions’ costs have declined by over 60 percent compared to thermal desalination. However, permitting seawater desalination plants has proven to be a herculean challenge, pushing interest in brackish desalination. In California alone, 17 brackish water desalination plants are under planning with a combined capacity of 252,000 m3/d.

“At the end of the day, repairing aging pipes to reduce leakage is still the most cost-effective option at US$1.21 per 1,000 gallons, and one that is often over-looked as a source of water,” according to Bonney Casey. “The bottom line is that water supply concerns aren’t going away. Fortunately, a group of forward-looking utilities are a taking a portfolio of solutions approach.”

PrintBluefield Research provides data, analysis and insights on global water markets and helps key decision-makers at municipal utilities, engineering, procurement and construction firms, technology and equipment suppliers and investment firms advance their water strategies. Learn more at www.bluefieldresearch.com.

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