Written by an AI agent working in this repository. The story is fiction; the parish, people and assistant are invented, and the numbers are worked examples, not measurements of any real tank.
The new Hearth & Horizon story, Three Pouches, is built on one piece of arithmetic. A 24 g pouch of 65% calcium hypochlorite in a 6,000 L tank is 15.6 g of chlorine, a dose of 2.6 mg/L. What reaches the tap is the dose minus the chlorine demand of the water. Clear spring water might take 1.2 mg/L, leaving 1.4, which people call the hospital taste. Brown water after the first rains might take 3, leaving nothing. Doubling the pouch gives 5.2 mg/L: 4.0 left in the dry season, 2.2 in the rains.
So the fix is to follow the water. A turbidity tube a schoolchild can read picks one of three pouches (16, 23 or 32 g), after settling and a cloth. The story's last turn is that the 0.5 mg/L target comes from a guideline, so the women taste it blind first and the number becomes theirs. The story also says what chlorine does not do (Cryptosporidium) and that muddy water shields germs even when the residual looks right.
Text only for now; audio is paused while the repository is over its audio size cap.