Low total trihalomethanes were measured (TTHM 8.6 μg/L). At the same time, haloacetic acids (HAAs 104.4 μg/L) showed that disinfection by-products must be evaluated separately.
More controlled chlorination. Less unnecessary chemical burden.
PoolDesign treats chlorination as a matter of technical control, not simply higher dosing. With proper circulation, monitoring, and laboratory data, unnecessary chemical burden can be limited without losing control of water quality. The results presented here concern specific low-bather-load private pools and do not constitute a general operating instruction for every installation.
The problem is not chlorine. It is uncontrolled operation.
Chlorine remains a basic and necessary method for disinfecting pool water. The problem begins when operation relies only on increased dosing, without sufficient technical control of circulation, filtration, usage load, and real measurements.
In this type of operation, the installation may show stronger chlorine odor, more frequent corrective interventions, higher chemical burden, and less predictable water quality. The answer is not simply “more chlorine”. The correct answer is better technical control.
PoolDesign’s approach
The goal is not “low chlorination”. The goal is correct disinfection with the lowest necessary chemical load, according to the real conditions of each installation.
PoolDesign examines chlorination as part of a complete technical system. Water quality does not depend only on how much chlorine is added, but also on circulation, filtration, temperature, bather load, pH, filter condition, and systematic monitoring of operating indicators.
With this logic, reduced unnecessary chemical burden is not presented as a promise. It occurs only when the installation has been designed, adjusted, and monitored according to technical criteria.
What the available data showed
PoolDesign evaluated data from two low-bather-load private pools where a stable low-dose TCCA protocol was applied under specific operating conditions.
The transition to a controlled TCCA protocol was associated with a 96.7% reduction in introduced active chlorine in this specific installation.
The available microbiological indicators were not detected in the specific samples, without this constituting general operating evidence for every pool.
The important conclusion is not that “all by-products were low”. THMs were low in the specific measurement, while HAAs were measurable and highlighted the need for more complete monitoring of disinfection by-products.
This makes the technical assessment more reliable: it is not based only on chemical consumption or the absence of odor, but on real measurements and clear recognition of their limitations.
What this means for an owner or facility manager
For a pool owner, hotelier, or facility manager, the value of this approach is not only in the laboratory numbers. It is mainly in the ability to better control daily operation.
- A clearer picture of how the pool actually operates.
- Limiting unnecessary chemical burden, when conditions allow it.
- A better basis for technical decisions rather than adjustments “by eye”.
- More systematic monitoring of water quality.
- A useful technical basis for indoor pools, where water quality and air quality are closely connected.
This approach does not replace legislation, operating requirements, or the responsibility of the qualified technician. On the contrary, it provides a better basis for evaluating each installation with real data.
What must not be misinterpreted
These specific results do not mean that every pool can operate with the same dosage or the same protocol. Every installation has different usage load, temperature, hydraulic behavior, feed water quality, filtration method, and compliance requirements.
- It is not a general instruction to reduce residual chlorine.
- It does not apply to public or high-load installations without separate evaluation.
- It does not replace national and European operating requirements.
- It does not prove that all disinfection by-products are reduced in the same way.
- It must not be applied without technical study, monitoring, and laboratory confirmation where required.
The value of the data lies precisely in this distinction: it shows a technically interesting direction, but also the limits within which it must be read.
For technicians, engineers, and facility managers
The full technical documentation is presented in PoolDesign’s White Paper. It analyzes the methodology, results, limitations, interpretation of measurements, and relevant bibliography.
The technical text is intended for those who want to examine in detail the data behind this page: what was measured, under which conditions, which conclusions can be drawn, and which points require further confirmation.
This page provides the summary view. The technical white paper is the full documentation text.
Read the technical white paperPoolDesign’s philosophy
For PoolDesign, water quality is not the result of a single setting. It is the result of design, equipment, circulation, filtration, correct disinfection, and systematic monitoring.
Technical optimization of chlorination does not mean less safety. It means better control, fewer unnecessary deviations, and a clearer picture of the pool’s real operation.
Each project must be evaluated separately. This is the only serious way for the reduction of unnecessary chemical burden to be based on technical data and not on general promises.
Evaluate pool operation with real data
Contact PoolDesign for a technical assessment of a new or existing pool, based on the real operating conditions, the installation requirements, and the water quality goals.
