New Jersey American Water Concludes Temporary Treatment Change in Water Treatment Plants Serving Coastal Part of the State

New Jersey American Water (NYSE: AWK) will resume using chloramines at its Swimming River (Colts Neck) and Jumping Brook (Neptune) water treatment plants the week of April 13, 2026.

Rhea-AI Summary

New Jersey American Water (NYSE: AWK) will resume using chloramines at its Swimming River (Colts Neck) and Jumping Brook (Neptune) water treatment plants the week of April 13, 2026. The plants serve customers in portions of Monmouth and Ocean counties.

In mid‑February the company temporarily switched to chlorine for about eight weeks as part of routine maintenance. Customers may have noticed a slight chlorine taste and smell during that period; the taste and smell are expected to subside after the return to chloramine. For more information about chloramine use, visit the company's website.

Argus Apr 1 session

+0.51% close to close 0.9x rel. volume Open Argus

Details

News Market Reaction – AWK

On Apr 1, the first trading day after this news, AWK closed 0.51% above the previous close.

Data tracked by StockTitan Argus for the Apr 1 session.

Key Figures

Treatment change duration: about eight weeks Process resumption week: week of April 13 Chloramine use since: 2012

Treatment change duration

about eight weeks

Temporary shift from chloramine to chlorine

Process resumption week

week of April 13

Return to chloramines at New Jersey plants

Chloramine use since

2012

Chloramine disinfection in Monmouth and Ocean counties

Historical Context

5 past events · Latest: Mar 30

5 events

1. Mar 30

   Anniversary & investment

   24h Move

   +1.4%

   140-year milestone and up to $48B planned infrastructure investments highlighted.

2. Mar 26

   Infrastructure upgrade

   24h Move

   +2.2%

   $815,000 Huntington project within $129M 2026 state investment plan.

3. Mar 25

   Pipe replacement project

   24h Move

   +0.8%

   $560,000 Dunbar project tied to broader $129M 2026 plan.

4. Mar 25

   NYSE programming feature

   24h Move

   +0.8%

   Company participation in NYSE programming around 140th anniversary.

5. Mar 24

   Water stewardship panel

   24h Move

   -1.6%

   CERAWeek 2026 panel on water stewardship and regulatory engagement.

24h Move is the share-price change in the day after each event; other market factors may also have contributed.

Key Terms

chloramines, US Environmental Protection Agency (EPA), New Jersey Department of Environmental Protection (NJDEP)

3 terms

chloramines medical

"New Jersey American Water will complete its scheduled routine treatment change and resume using chloramines"

Chloramines are chemical disinfectants created when chlorine combines with small amounts of ammonia; they are commonly used to keep drinking water and industrial process water free of harmful microbes. Investors should care because switching to or from chloramine treatment can affect utility and manufacturing costs, regulatory compliance, and product safety — similar to changing a factory’s fuel source, it can alter operating expenses, equipment needs, and liability risks.

US Environmental Protection Agency (EPA) regulatory

"meet all US Environmental Protection Agency (EPA) and New Jersey Department of Environmental Protection"

The U.S. Environmental Protection Agency (EPA) is the federal agency that writes and enforces rules to protect air, water and land from pollution; think of it as a national referee and building inspector for environmental standards. Investors care because EPA actions can change a company’s costs, legal risk and ability to operate—through permits, cleanup orders, fines or limits on emissions—affecting profitability, valuation and long-term viability like a rule change reshaping a playing field.

New Jersey Department of Environmental Protection (NJDEP) regulatory

"meet all US Environmental Protection Agency (EPA) and New Jersey Department of Environmental Protection (NJDEP)"

A state government agency that sets and enforces environmental rules in New Jersey, issues permits for air, water and waste activities, and oversees pollution cleanup and natural resource protection. For investors, the agency acts like a referee and gatekeeper: its permits, inspections and enforcement actions can affect a company’s ability to operate, add costs, delay projects or create liability, so regulatory decisions can materially influence a project's timeline, expenses and risk profile.

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CAMDEN, N.J., March 31, 2026 /PRNewswire/ -- On the week of April 13, New Jersey American Water will complete its scheduled routine treatment change and resume using chloramines at its Swimming River Water Treatment Plant in Colts Neck and its Jumping Brook Water Treatment Plant in Neptune. These plants serve New Jersey American Water customers in portions of Monmouth and Ocean Counties.

In mid-February, as part of an annual routine maintenance program for its water distribution system, New Jersey American Water temporarily shifted the water treatment process from using chloramine to chlorine for about eight weeks. Chloramines have long been an effective method of water disinfection that meet all US Environmental Protection Agency (EPA) and New Jersey Department of Environmental Protection (NJDEP) drinking water standards and have been used by New Jersey American Water in Monmouth and Ocean counties since 2012.

The treatment change applies to New Jersey American Water customers in the following communities:

Aberdeen, Allenhurst, Asbury Park City, Atlantic Highlands, Avon, Bay Head, Belmar, Bradley Beach, Colts Neck Township, Deal, Eatontown, Elberon, Fair Haven, Hazlet, Highlands, Holmdel Township, Interlaken, Keansburg, Lake Como, Little Silver, Loch Arbor Village, Long Branch City, Matawan, Middletown Township, Monmouth Beach, Neptune City, Neptune Township (incl. Ocean Grove), Ocean Township, Oceanport, Red Bank, Rumson, Sea Bright, Shrewsbury, Shrewsbury Township, Tinton Falls, Union Beach, Wanamassa, and West Long Branch.

This treatment change also applies to residents living in the following communities that purchase water from New Jersey American Water: Aberdeen Township, Avon, Belmar, Keyport, Lake Como, Matawan, Naval Weapons Station Earle, Keansburg and Point Pleasant Borough.

During the routine maintenance, some customers may have noticed a slight chlorine taste and smell in their water. With the resumption of the chloramine process, the taste and smell of chlorine will subside. For more information about the use of chloramine in water treatment, visit newjerseyamwater.com.

About New Jersey American Water 
New Jersey American Water, a subsidiary of American Water (NYSE: AWK), is the largest regulated water utility in the state with approximately 875 dedicated employees working to provide safe, clean, reliable and affordable water and wastewater services to approximately 3 million people. For more information, visit www.newjerseyamwater.com and follow New Jersey American Water on LinkedIn, Facebook, X, and Instagram. 

View original content to download multimedia:https://www.prnewswire.com/news-releases/new-jersey-american-water-concludes-temporary-treatment-change-in-water-treatment-plants-serving-coastal-part-of-the-state-302730635.html

SOURCE American Water

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

When will New Jersey American Water (AWK) resume chloramine treatment at Swimming River and Jumping Brook?

New Jersey American Water will resume using chloramines the week of April 13, 2026 at those two plants. According to the company, this follows an approximately eight‑week temporary switch to chlorine that began in mid‑February as part of routine maintenance.

Which Monmouth and Ocean County communities are affected by the AWK treatment change?

Customers in many Monmouth and Ocean County communities served by the two plants are affected, including Long Branch, Neptune Township and Middletown. According to the company, the notice names about 40 municipalities and several water purchasers served by those plants.

Will customers still notice a chlorine taste after New Jersey American Water (AWK) returns to chloramines?

Customers should see the chlorine taste and smell subside after the return to chloramine treatment. According to the company, some customers noticed a slight chlorine taste during the eight‑week chlorine period; switching back will reduce that taste and odor.

Is chloramine treatment used by New Jersey American Water (AWK) compliant with regulators?

Yes. Chloramines meet EPA and New Jersey DEP drinking water standards and have been used in these service areas since 2012. According to the company, chloramine disinfection complies with regulatory standards for the Monmouth and Ocean county systems.

Where can customers find more information about the AWK treatment change and timeline?

Customers can find details and timing information on New Jersey American Water's website and customer pages. According to the company, the transition will complete the week of April 13, 2026 and the site explains chloramine use and related guidance.