Daily Water Watch: La Plata Rises to 44.40 Meters

Day 38 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 39.16 meters — up 2 centimeters from yesterday, and La Plata at 44.40 meters — up 14 centimeters 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: a rise

Carraízo gained ground overnight. This morning’s chart puts it at 39.16 meters — up 2 centimeters from yesterday, in the observación band. The next line on the chart — into the ajustes band — sits at 38.50 meters, 0.66 meters below this morning’s reading.

La Plata: a rise

La Plata gained ground overnight. This morning’s chart puts it at 44.40 meters — up 14 centimeters from yesterday, in the ajustes band. The next line on the chart — into the control band — sits at 40.50 meters, 3.90 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 lost momentum: this week’s average gain is well below the previous week’s pace, even after a rain-driven bump the morning after the wettest day. The arithmetic still points toward the seguridad line in the coming days if the slower rate holds, but the deceleration itself is the more telling signal — the reservoir is rising, just not as fast as it was. La Plata, meanwhile, has essentially stalled. Its trailing-week average rounds to no change at all, masking a recent three-morning streak of gains that followed rain, even as the two wettest days on record this week were each followed by drops the next morning. The net effect is a reservoir holding roughly steady after a long decline, with no clear direction emerging yet.

Cidra continues its slow, rain-supported creep upward, with each of the week’s wetter days followed by a positive next-morning reading. That pattern is consistent but modest, and the resulting pace projection for reaching the band above is a long-horizon calculation, not a near-term shift. Across all three reservoirs, rain this week does appear to be helping more than hurting, but the responses vary in size and timing, and none of the current trajectories suggest a sudden change in band status. The next several mornings’ readings will show whether these paces continue, flatten further, or reverse.

What to watch

• Carraízo: whether the rise survives a dry week — this week’s gain came with 1.47 in of rain nearby.
• Cidra: whether the rise survives a dry week — this week’s gain came with 3.74 in of rain nearby.

The other rationing reservoir

Numbers from AAA’s Monitoreo Diario chart of 2026-09-14, 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.