Daily Water Watch: La Plata at 44.63 Meters

Day 48 of the metro rotation plan — interruptions paused since September 2, AAA has not cancelled the plan. This morning’s 5:00 chart from the Autoridad de Acueductos y Alcantarillados shows Carraízo at 40.68 meters — down 2 centimeters from yesterday, and La Plata at 44.63 meters — down 5 centimeters from yesterday.

This is the 43th entry in our daily chart check (yesterday’s is here), built the same way every morning — from AAA’s own numbers, read off its charts for our reservoir board.

Carraízo: down 2 cm

Carraízo kept sliding. This morning’s chart puts it at 40.68 meters — down 2 centimeters from yesterday, in the seguridad band. The next line on the chart — into the observación band — sits at 39.70 meters, 0.98 meters below this morning’s reading. At AAA’s printed pace that is roughly 49 days out (straight-line date: 2026-11-12 — a projection, not a forecast; one wet afternoon moves it).

La Plata: down 5 cm

La Plata kept sliding. This morning’s chart puts it at 44.63 meters — down 5 centimeters from yesterday, in the ajustes band. The next line on the chart — into the control band — sits at 40.50 meters, 4.13 meters below this morning’s reading.

If your water comes from La Plata — Dorado, Guaynabo, Naranjito, Toa Alta, Toa Baja, Vega Alta, Bayamón, Cataño, Corozal — this is the reservoir to watch; AAA lists 130,828 client accounts on it.

What the numbers say

Carraízo’s climb has essentially stalled: the past week’s average gain of 0.7 cm a day is a sharp pullback from the prior week’s pace of 14.3 cm a day, and the reservoir has actually recorded four straight lower mornings even as the longer window still shows it rising. Rain in the area stayed minimal, so there’s little to explain a rebound in the near term. Cidra shows a similar pattern of losing steam, with its trailing-week rate down from the prior week’s, though its own streak has been flat rather than falling. Both reservoirs remain comfortably above their next lower band lines for now, but the deceleration is the story, not any reversal.

La Plata is the more active case this week, rising at a steadier clip than its own prior-week pace, a small acceleration rather than a swing. Arithmetic on that trailing rate puts the level crossing back into the observación band around October 2. Rainfall near La Plata’s gauges was light, so the gain looks driven more by inflow management than by rain response. None of the three reservoirs saw meaningful rainfall this week, and with Carraízo and Cidra both cooling off, La Plata’s steadier upward pace stands out as the one clear directional signal in this week’s readings.

What to watch

• La Plata: whether the rise survives a dry week — this week’s gain came with 0.04 in of rain nearby.
• Río Grande, Canóvanas and Loíza: whether AAA says in public that the east-side rationing is over, and posts that the Canóvanas filtration plant is back in operation.

The other rationing reservoir

Numbers from AAA’s Monitoreo Diario chart of 2026-09-24, read each morning for our reservoir board — where the levels, the bands, and the live rain gauges update daily. Rain figures are USGS gauges within 12 km of each reservoir (a proximity proxy, not a basin measurement). Day counts start 2026-08-08, when the metro rotation took effect. Straight-line dates are arithmetic, not forecasts. The analysis paragraphs are drafted by Claude from the computed figures and checked number-by-number against them before publishing.