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⬢ Pool Professionals
Professional-grade products. Expert support. Built for your business.

⬢ Pool Owners
Eco-friendly, easy-to-use solutions to keep your pool clean and clear.

⬢ Industrial
Efficient treatment & supply. Performance-focused operations support.

⬢ Municipal
Reliable solutions & delivery. Sustainable treatment for public systems.

⬢ Dealers
Help your pool & spa customers with trusted, professional-grade products.

For Pool Pros: Master pool chemistry & avoid costly mistakes with our guide.

For Homeowners: Let HASA be your year-round Pool Partner.

⬢ Pool Products
HASA has the chlorine, algaecides, and sanitizers you need to keep your pool or spa clean and clear.

⬢ Hot Tub Products
Shop our full line of Hi-Temp spa care products, including Eco-Safe Clarifiers and pH Increasers.

⬢ Ancillary Products
Our eco-friendly water treatments are science-backed and purposefully focused.

⬢ Mini-Bulk Program
We deliver a premium 12.5% sodium hypochlorite solution for sanitizing commercial pools and large-scale water systems.

⬢ Blog
Learn from water chemistry experts.

⬢ Videos
Browse instructional how-to videos.

⬢ Safety Data Sheets
Download SDS sheets for HASA products.

⬢ Pool Chemical Calculator
Achieve balanced chemistry easily.

⬢ Liquid Chlorine For Pools
A service professional’s guide that's been made simple.

⬢ Orenda Academy
For water chemistry & professional pool management knowledge.

⬢ Events
Find HASA at an event near you.

⬢ Rewards
Explore our HASA loyalty rewards program.

Use the HASA Dealer Locator See where our products are sold near you with this tool.

HASA: Trusted Water Treatment Suppliers for Municipal Excellence

HASA delivers NSF-certified water treatment chemicals and proven expertise to help municipalities maintain safe, compliant water systems. Since 1964, we've helped to successfully deliver over 20 billion gallons of clean water annually through our comprehensive water treatment process solutions.

Why Choose HASA as Your Water Treatment Chemicals Supplier?

HASA stands apart from other water treatment chemicals suppliers through our complete plant-to-truck supply model and 60+ years of municipal expertise. Our fully owned manufacturing and distribution network ensures you receive the freshest, highest-concentration water treatment chemicals, on time and exactly when you need them.

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Complete Supply Chain Control

Unlike other water treatment chemicals suppliers, HASA owns every step from manufacturing to delivery, guaranteeing consistent product quality and on-time delivery for your water treatment process.

Specialized Municipal Expertise

We deliver small quantities to challenging locations that other suppliers won't serve, including stations near residential facilities, a capability that sets us apart in the municipal water treatment market.

NSF 60 Certified Products

Our Multi-Chlor® sodium hypochlorite meets the highest drinking water standards and is manufactured from naturally derived salt, water, and electricity.

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Reliable Water Treatment Supplies Delivered on Time, Every Time

Potable water treatment cannot afford downtime; it’s a critical utility that all citizens rely on. You can rest easy knowing that you’ll have uninterrupted treatment supplies with our safety-certified crews, advance shipping notice, and real-time delivery tracking.

How Does HASA's Water Treatment Process Differ?

Our water treatment process begins with the production of the freshest sodium hypochlorite using our proprietary manufacturing methods and industry-leading filtration methods that ensure the highest-quality products by removing any impurities that can destabilize or degrade the finished product. We deliver the highest concentration products available (up to 15% sodium hypochlorite), maximizing effectiveness while reducing storage requirements and operational costs.

Advanced Safety Protocols

Safety-certified delivery crews, advance shipping notices, a mini-bulk delivery program, and real-time delivery tracking ensure seamless integration with your water treatment process.

Flexible Delivery Solutions

From emergency 24-48 hour deliveries to scheduled weekly service, we can dynamically adapt to meet your municipal water treatment needs.

Real Results:

San Francisco Water Department Case Study

Discover how the San Francisco Water Department transformed its operations with HASA's specialized water treatment solutions. This comprehensive case study demonstrates measurable improvements in cost reduction, risk mitigation, and operational efficiency.

Key Outcomes Achieved:

Successful management of chloraminated water challenges
Regulatory compliance maintenance across 800,000+ residents
Seamless weekly delivery operations despite challenging urban locations
Long-term partnership spanning 3+ years of reliable service

See How They Did It

Modern Municipal Water Treatment Solution Ebook

NSF Certified From Start to Finish

HASA’s Multi-Chlor® sodium hypochlorite is a high-concentration liquid sanitizer that is certified to NSF 60 drinking water standards. It is made from naturally derived products and manufactured using a combination of water, salt, and electricity. After it cleans and disinfects the water supply, sodium hypochlorite returns to its original state as salt.

Your Water Treatment Goals Are Our Priority

With HASA, you receive 1:1 support for meeting your water sanitization standards on time and within budget.

We’re dedicated to being the go-to source for the premier water treatment and sanitization products available — but, more importantly, we’re proudly committed to being an accountable partner and resource to the municipalities that rely on our solutions.

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Your Water Treatment Goals Are Our Priority

With HASA, you receive dedicated 1:1 support for meeting water sanitization standards on time and within budget. We're not just water treatment suppliers; we're your strategic partner in maintaining regulatory compliance and operational excellence.

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Speed and Value

Access the highest concentration water treatment chemicals for maximum effectiveness and efficiency, with emergency lead times as low as 24-48 hours when your water treatment process demands immediate action.

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On-Site Technical Support

Our water treatment experts provide on-site visits and technical support, ensuring optimal safety and seamless integration of our products into your existing water treatment process.

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Continuing Education Resources

Stay current with the latest water treatment technologies, regulatory changes, and sustainable practices through our comprehensive resource library and expert guidance.

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Professional Development

Advance your team's expertise with our water treatment training programs and continued certification opportunities, building internal capacity to manage your water treatment processes.

Proven Results in Smarter Water Treatment

Discover how the San Francisco Water Department reduced costs, minimized risk, and improved operations with HASA’s liquid bleach solution. This free guide walks you through the strategies, safety measures, and sustainability benefits that leading municipalities and industrial facilities are already putting to work.

See How They Did It

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Clean Up After a Wildfire

Learn how to carefully restore swimming pools to safety with practical and actionable tips and advice.

Download the Resource

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HASA's San Francisco Municipal Case Study

How HASA helped the San Francisco Water Department improve safety, operational efficiency, and regulatory compliance.

Download Case Study

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Understanding Chlorine Demand

Find out what factors lower chlorine effectiveness with our downloadable one-pager.

Download and Save

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Buy HASA Products Near You

Use our dealer and distributor locator to find out where you can purchase HASA products in your area.

Find a HASA Dealer

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Recreational Water Treatments

Learn about HASA’s premium product to sanitize and shock pools and spas.

Explore HASA Sani-Clor®

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Individualized Assistance

Fill out the contact form or get in touch with the HASA representative in your area.

Contact Our Team

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"To this day, over the 3+ year relationship we have enjoyed with HASA, our water systems maintain a high level of compliance and potability due in large part to the proactive and professional service received from Christopher Cornish and HASA. They are always willing to help, even with larger projects and deliveries not currently under contract with them."

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Brahman Conci

Operations Superintendent, San Francisco Water Department Distribution Division

Partner With the Industry's Most Trusted Water Treatment Suppliers

For over 60 years, HASA has set the standard for excellence in municipal water treatment. Our combination of NSF-certified products, specialized delivery capabilities, and comprehensive technical support makes us the preferred choice for forward-thinking municipalities nationwide.

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