787dailyPuerto Rico · En Inglés
Today’s Briefing

Infrastructure

Daily Water Watch: La Plata at 44.47 Meters

Published Sep 26, 2026 · 787 Daily · Original analysis

Day 50 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 40.67 meters — down 1 centimeter from yesterday, and La Plata at 44.47 meters — down 9 centimeters from yesterday.

This is the 45th 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 1 cm

Carraízo kept sliding. This morning’s chart puts it at 40.67 meters — down 1 centimeter from yesterday, in the seguridad band. The next line on the chart — into the observación band — sits at 39.70 meters, 0.97 meters below this morning’s reading.

ajustes observación seguridad 37.0 37.5 38.0 38.5 39.0 39.5 40.0 40.5 41.0 Aug 7 Sep 1 Sep 26 Aug 7, 37.64 m, ajustesAug 9, 37.53 m, −11 cm, ajustesAug 10, 37.48 m, −5 cm, ajustesAug 11, 37.43 m, −5 cm, ajustesAug 12, 37.53 m, +10 cm, ajustesAug 13, 37.79 m, +26 cm, ajustesAug 14, 37.86 m, +7 cm, ajustesAug 15, 37.85 m, −1 cm, ajustesAug 16, 37.82 m, −3 cm, ajustesAug 17, 37.76 m, −6 cm, ajustesAug 18, 37.69 m, −7 cm, ajustesAug 19, 37.63 m, −6 cm, ajustesAug 20, 37.57 m, −6 cm, ajustesAug 21, 37.52 m, −5 cm, ajustesAug 22, 37.46 m, −6 cm, ajustesAug 23, 37.41 m, −5 cm, ajustesAug 24, 37.34 m, −7 cm, ajustesAug 25, 37.32 m, −2 cm, ajustesAug 26, 37.30 m, −2 cm, ajustesAug 27, 37.26 m, −4 cm, ajustesAug 28, 37.20 m, −6 cm, ajustesAug 29, 37.14 m, −6 cm, ajustesAug 30, 37.07 m, −7 cm, ajustesAug 31, 37.14 m, +7 cm, ajustesSep 1, 37.20 m, +6 cm, ajustesSep 2, 38.92 m, +172 cm, observaciónSep 3, 39.11 m, +19 cm, observaciónSep 4, 39.09 m, −2 cm, observaciónSep 5, 39.01 m, −8 cm, observaciónSep 6, 38.94 m, −7 cm, observaciónSep 7, 38.87 m, −7 cm, observaciónSep 8, 38.83 m, −4 cm, observaciónSep 9, 39.02 m, +19 cm, observaciónSep 10, 39.07 m, +5 cm, observaciónSep 11, 39.20 m, +13 cm, observaciónSep 12, 39.19 m, −1 cm, observaciónSep 13, 39.14 m, −5 cm, observaciónSep 14, 39.16 m, +2 cm, observaciónSep 15, 39.25 m, +9 cm, observaciónSep 16, 39.23 m, −2 cm, observaciónSep 17, 40.06 m, +83 cm, seguridadSep 18, 40.64 m, +58 cm, seguridadSep 19, 40.80 m, +16 cm, seguridadSep 20, 40.81 m, +1 cm, seguridadSep 21, 40.79 m, −2 cm, seguridadSep 22, 40.75 m, −4 cm, seguridadSep 23, 40.70 m, −5 cm, seguridadSep 24, 40.68 m, −2 cm, seguridadSep 25, 40.68 m, +0 cm, seguridadSep 26, 40.67 m, −1 cm, seguridad 40.67 m at ~1 cm/day Sep 23, 0.04 in of rainSep 24, 0.01 in of rain rain to 0.04 in
Carraízo since Aug 7, metres above sea level, shaded by AAA alert band, with daily rain from USGS gauges within 12 km. Data: AAA Monitoreo Diario.

Carraízo, September 26

Level today
40.67 mband: seguridad
Change since yesterday
-1 cm
To the observación line
0.97 mline at 39.70 m
At the current pace
months awaythe decline is very shallow

La Plata: down 9 cm

La Plata kept sliding. This morning’s chart puts it at 44.47 meters — down 9 centimeters from yesterday, in the ajustes band. The next line on the chart — into the control band — sits at 40.50 meters, 3.97 meters below this morning’s reading. At AAA’s printed pace that is roughly 44.1 days out (straight-line date: 2026-11-10 — a projection, not a forecast; one wet afternoon moves it).

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.

ajustes observación seguridad 40 42 44 46 48 50 52 Aug 7 Sep 1 Sep 26 Aug 7, 46.55 m, observaciónAug 9, 46.38 m, −17 cm, observaciónAug 10, 46.29 m, −9 cm, observaciónAug 11, 46.20 m, −9 cm, observaciónAug 12, 46.16 m, −4 cm, observaciónAug 13, 46.11 m, −5 cm, observaciónAug 14, 46.02 m, −9 cm, observaciónAug 15, 45.95 m, −7 cm, observaciónAug 16, 45.88 m, −7 cm, observaciónAug 17, 45.80 m, −8 cm, observaciónAug 18, 45.71 m, −9 cm, observaciónAug 19, 45.62 m, −9 cm, observaciónAug 20, 45.55 m, −7 cm, observaciónAug 21, 45.49 m, −6 cm, observaciónAug 22, 45.42 m, −7 cm, observaciónAug 23, 45.35 m, −7 cm, observaciónAug 24, 45.28 m, −7 cm, observaciónAug 25, 45.23 m, −5 cm, observaciónAug 26, 45.15 m, −8 cm, observaciónAug 27, 45.04 m, −11 cm, observaciónAug 28, 44.93 m, −11 cm, observaciónAug 29, 44.83 m, −10 cm, ajustesAug 30, 44.72 m, −11 cm, ajustesAug 31, 44.67 m, −5 cm, ajustesSep 1, 44.59 m, −8 cm, ajustesSep 2, 44.59 m, +0 cm, ajustesSep 3, 44.59 m, +0 cm, ajustesSep 4, 44.57 m, −2 cm, ajustesSep 5, 44.54 m, −3 cm, ajustesSep 6, 44.52 m, −2 cm, ajustesSep 7, 44.46 m, −6 cm, ajustesSep 8, 44.40 m, −6 cm, ajustesSep 9, 44.32 m, −8 cm, ajustesSep 10, 44.24 m, −8 cm, ajustesSep 11, 44.14 m, −10 cm, ajustesSep 12, 44.25 m, +11 cm, ajustesSep 13, 44.26 m, +1 cm, ajustesSep 14, 44.40 m, +14 cm, ajustesSep 15, 44.46 m, +6 cm, ajustesSep 16, 44.40 m, −6 cm, ajustesSep 17, 44.36 m, −4 cm, ajustesSep 18, 44.40 m, +4 cm, ajustesSep 19, 44.61 m, +21 cm, ajustesSep 20, 44.66 m, +5 cm, ajustesSep 21, 44.70 m, +4 cm, ajustesSep 22, 44.72 m, +2 cm, ajustesSep 23, 44.68 m, −4 cm, ajustesSep 24, 44.63 m, −5 cm, ajustesSep 25, 44.56 m, −7 cm, ajustesSep 26, 44.47 m, −9 cm, ajustes 44.47 m at ~9 cm/day Sep 21, 0.01 in of rainSep 23, 0.01 in of rainSep 24, 0.02 in of rainSep 25, 0.02 in of rain rain to 0.02 in
La Plata since Aug 7, metres above sea level, shaded by AAA alert band, with daily rain from USGS gauges within 12 km. Data: AAA Monitoreo Diario.

La Plata, September 26

Level today
44.47 mband: ajustes
Change since yesterday
-9 cm
To the control line
3.97 mline at 40.50 m
At the current pace
≈ 44.1 daysstraight-line date: 2026-11-10

What the numbers say

Carraízo’s slide has eased dramatically from last week’s steep 27.7 cm-a-day pace to 2.3 cm a day now, but it’s still headed the wrong direction, with rain gauges nearby logging just 0.05 in this week — not enough to change the arithmetic. That math points to the observación line arriving around November 8 if the current pace holds, a projection rather than a prediction. La Plata is falling faster than it was, up from 5.8 cm a day to 3.2 cm a day, and has now dropped for four straight mornings. Its 0.06 in of rain this week did nothing to slow that slide.

Cidra is the outlier: essentially flat this week, a slowdown from the 4.7 cm-a-day pace it carried before, even with 0.59 in of rain falling nearby — more than the other two reservoirs combined saw. That flatness means no near-term arithmetic points to the ajustes line below. Across the three, the pattern is consistent: rain this week was too light almost everywhere to reverse declines, and the pace of loss is easing at Carraízo and Cidra while accelerating at La Plata, which is the one to watch for any signal of approaching its next lower band.

What to watch

  • 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

Cidra, September 26

Level today
400.53 mband: observación
Change since yesterday
0 cm
To the ajustes line
0.30 mline at 400.23 m
At the current pace
holding

Numbers from AAA’s Monitoreo Diario chart of 2026-09-26, 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.