Work out your pool’s IRAPI
The risk index that Resolución 234 de 2026 requires to be calculated for each pool, and that the inspector checks on site. Anything above ten comes out of the table as water unfit for use.
IRAPI risk index
0 of 9 parameters marked
Mark all nine parameters to see the index. With one left unmarked there is no IRAPI to give.
Where it comes from
The formula
Resolución 234 de 2026, technical annex II: IRAPI = VCM (45 %) + VCR (20 %) + VAC (30 %) + VCT (5 %). Each parameter out of range contributes its risk points, and the nine add up to one hundred.
The asymmetry of the residual
The disinfectant residual is the only parameter with two scores: ten points if the result comes out above the accepted value, and twenty if it comes out below. Overshooting weighs half as much as falling short, and that makes sense: over-chlorinated water is unpleasant, under-chlorinated water infects.
Why it matters
It is not a voluntary indicator. Whoever is responsible for the pool must calculate it, pool by pool, and the health authority checks it during the inspection visit. At high risk it calls for an improvement plan with a timetable and notifies the person responsible, the town hall, the public prosecutor’s local office and the municipal health department.
What this tool does not claim
A tool that answers what its source does not say is worse than no tool at all. This is what is deliberately left unanswered here, and why.
- It does not carry the accepted ranges for each parameter. That is why it asks «in range or out of range» instead of the measured value: publishing thresholds that were not verified against the official source is exactly what this site does not do. The laboratory report already has that comparison settled.
- It does not replace the laboratory analysis or the logbook the rules require. It is the arithmetic of the annex, done properly, on results somebody else has to measure.
- It does not say how often the water must be analysed. The frequency depends on the type of pool and the season, and that part was not transcribed here.
- It does not settle an ambiguity in the annex itself. The per-parameter table gives pH, ORP and cyanuric acid 10, 15 and 5 points, but the criteria table says that, when they are out of range, «the full risk score, thirty (30)%, shall be assigned». Read literally, a pH or a cyanuric acid out of range would add 30 and the water would already be unfit. The resolution does not say which reading prevails; the tool follows the per-parameter table.
It is cracking. It leaks. Something is wrong.
A technical inspection to establish what is happening and why, before spending on repairs that do not address the cause. You get the diagnosis in writing, with the remedies and the order to do them in.