From the article:
No. Just. NO.
From the Catechism:
Moreover, although the author quotes Aquinas, he does so poorly. What Aquinas actually wrote, when reading in context, is:
In other words, holy water doesn’t cause the forgiveness. The forgiveness of sin is real, but it isn’t due to the holy water – it’s due to the fact that it gives witness to the “implication of the infusion of grace” already present in the person. Aquinas explicitly states that there is no new grace conferred.
Further, in reply to objection 1 in the same article, he writes:
In other words, holy water only “inclines the soul”, but it doesn’t cause penance. Therefore, remission of venial sin does occur… but not due to the holy water; rather, it’s because of the grace already present in the person and the person’s penitence for their sin.