Wells 4, 7 & 13 On-Site Chlorine Generation (OSG) and Fluoride Injection ImprovementsCC-1734 November 18, 2025
Project Location – Wells 4, 7 & 13
Project Background
City has disinfected groundwater using chlorine gas since the 1950s.
Storing and handling chlorine gas is hazardous to staff and nearby neighborhoods.
Huntington Beach is one of few Orange County cities still using chlorine gas.
Project replaces chlorine-gas systems with modern on-site generation using salt, water and electricity.
Also replaces existing fluoride equipment to maintain State-recommended dental health levels.
Project Benefits
Eliminates hazardous chlorine gas storage and handling.
Enhances safety for City staff and nearby residents.
Ensures a reliable, locally generated disinfectant supply.
Reduces dependence on limited chlorine gas suppliers.
Avoids importing more expensive
MWD water, which can double
monthly costs.
Keeps City drinking water safe and
cost-effective.
Funding
Construction Costs
Arnaz Engineering Contractors, Inc. Bid $5,143,000
10% Contingency $514,300
Supplemental Costs $642,700
TOTAL COST $6,300,000
Current Funding
Water Master Plan Fund $7,100,000
Tentative Construction Schedule: January–December 2026
Questions?