Day 37 of the metro rotation plan — interruptions paused since September 2, plan still in force. This morning’s 5:00 chart from the Autoridad de Acueductos y Alcantarillados shows Carraízo at 39.14 meters — down 5 centimeters from yesterday, and La Plata at 44.26 meters — up 1 centimeter from yesterday.
This is the 34th 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 5 cm
Carraízo kept sliding. This morning’s chart puts it at 39.14 meters — down 5 centimeters from yesterday, in the observación band. The next line on the chart — into the ajustes band — sits at 38.50 meters, 0.64 meters below this morning’s reading. At AAA’s printed pace that is roughly 12.8 days out (straight-line date: 2026-09-26 — a projection, not a forecast; one wet afternoon moves it).
Carraízo · September 13
- Level today
- 39.14 mband: observación
- Change since yesterday
- -5 cm
- To the ajustes line
- 0.64 mline at 38.50 m
- At the current pace
- ≈ 12.8 daysstraight-line date: 2026-09-26
La Plata: a rise
La Plata gained ground overnight. This morning’s chart puts it at 44.26 meters — up 1 centimeter from yesterday, in the ajustes band. The next line on the chart — into the control band — sits at 40.50 meters, 3.76 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.
La Plata · September 13
- Level today
- 44.26 mband: ajustes
- Change since yesterday
- +1 cm
- To the control line
- 3.76 mline at 40.50 m
- At the current pace
- rising
What the numbers say
Carraízo’s climb has clearly lost momentum, rising an average of 4.5 cm a day this week versus a much steeper pace the week before. Rain fell across the gauges nearby, but the heaviest single day was followed by a drop at the reservoir the next morning, a reminder that a wet day doesn’t always translate into an immediate gain on the chart. Cidra, by contrast, has held a steady rising pace week over week, and its gauges picked up a solid amount of rain, with the wettest day followed by a clear next-morning rise — a cleaner rain response than its neighbor’s.
La Plata is the one moving the wrong way, and doing so with more urgency: its weekly rate of decline has quickened compared to the previous week’s pace, even after picking up some rain of its own. Both wet days there were followed by next-morning drops, suggesting the rain did little to slow the slide. None of the three reservoirs are near a line today, but the arithmetic behind each one tells a different story — La Plata’s faster fall, Cidra’s steady gain, and Carraízo’s cooling rise all point toward slower-moving weeks ahead unless the rates shift again.
What to watch
- Carraízo: whether the rise survives a dry week — this week’s gain came with 1.82 in of rain nearby.
- Cidra: whether the rise survives a dry week — this week’s gain came with 4.52 in of rain nearby.
The other rationing reservoir
Cidra · September 13
- Level today
- 400.26 mband: observación
- Change since yesterday
- -1 cm
- To the ajustes line
- 0.03 mline at 400.23 m
- At the current pace
- ≈ 3 daysstraight-line date: 2026-09-16
Numbers from AAA’s Monitoreo Diario chart of 2026-09-13, 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.