Day 40 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 39.23 meters — down 2 centimeters from yesterday, and La Plata at 44.40 meters — down 6 centimeters from yesterday.
This is the 36th 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 39.23 meters — down 2 centimeters from yesterday, in the observación band. The next line on the chart — into the ajustes band — sits at 38.50 meters, 0.73 meters below this morning’s reading. At AAA’s printed pace that is roughly 36.5 days out (straight-line date: Oct 23 — a projection, not a forecast; one wet afternoon moves it).
Carraízo · September 16
- Level today
- 39.23 mband: observación
- Change since yesterday
- -2 cm
- To the ajustes line
- 0.73 mline at 38.50 m
- At the current pace
- ≈ 36.5 daysstraight-line date: Oct 23
La Plata: down 6 cm
La Plata kept sliding. This morning’s chart puts it at 44.40 meters — down 6 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.
La Plata · September 16
- Level today
- 44.40 mband: ajustes
- Change since yesterday
- -6 cm
- To the control line
- 3.90 mline at 40.50 m
- At the current pace
- months awaythe decline is very shallow
What the numbers say
Over the past week Carraízo has been rising an average of 2.7 cm a day, a reversal from a 1.5 cm-a-day decline the week before. Since the rotation began 38 days ago it has gained 170 cm, from 37.53 m. It sits 0.73 m above the ajustes line (the next band down), at 39.23 m in the observación band. If this week’s rise held, the level would climb into the seguridad band above (line at 39.70 m) in about 17 days, around October 4. Nearby USGS gauges recorded 3.13 in of rain this week, most of it September 14 (1.6 in). After the 0.6 in on September 13, the next morning’s reading was +2 cm. After the 1.6 in on September 14, the next morning’s reading was +9 cm.
Over the past week La Plata has been rising an average of 2.7 cm a day, a reversal from a 4.5 cm-a-day decline the week before. Since the rotation began 38 days ago it has lost 198 cm, from 46.38 m. It sits 3.90 m above the control line (the next band down), at 44.40 m in the ajustes band. If this week’s rise held, the level would climb into the observacion band above (line at 44.90 m) in about 19 days, around October 5. Nearby USGS gauges recorded 2.01 in of rain this week, most of it September 14 (1.09 in). After the 0.5 in on September 10, the next morning’s reading was -10 cm. After the 1.09 in on September 14, the next morning’s reading was +6 cm.
Over the past week Cidra has been rising an average of 1 cm a day. Since the rotation began 38 days ago it has gained 15 cm, from 400.13 m. It sits 0.05 m above the ajustes line (the next band down), at 400.28 m in the observación band. If this week’s rise held, the level would climb into the seguridad band above (line at 401.71 m) in about 143 days. Nearby USGS gauges recorded 3.88 in of rain this week, most of it September 14 (1.6 in). After the 1.57 in on September 10, the next morning’s reading was +5 cm. After the 1.6 in on September 14, the next morning’s reading was +1 cm.
What to watch
- Carraízo: whether the rise survives a dry week — this week’s gain came with 3.13 in of rain nearby.
- La Plata: whether the rise survives a dry week — this week’s gain came with 2.01 in of rain nearby.
- Cidra: whether the rise survives a dry week — this week’s gain came with 3.88 in of rain nearby.
The other rationing reservoir
Cidra · September 16
- Level today
- 400.28 mband: observación
- Change since yesterday
- +1 cm
- To the ajustes line
- 0.05 mline at 400.23 m
- At the current pace
- rising
Numbers from AAA’s Monitoreo Diario chart of Sep 16, 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 Aug 8, when the metro rotation took effect. Straight-line dates are arithmetic, not forecasts.