Toa Vaca crossed into the observación band this morning, at 146.99 meters. This morning’s 5:00 chart from the Puerto Rico Aqueduct and Sewer Authority shows Carraízo at 40.47 meters — down 4 centimeters from yesterday.
Updates
- 7:02 PM: AAA posted a change to the rationing plan: AAA’s notice.
Service today
Day 56 of the metro rotation plan — interruptions paused since September 2, AAA has not canceled the plan.
Most important now
- Rationing plan, posted at 7:02 PM: AAA’s notice
Every notice AAA posts is on the water page, in its own words.
Reservoirs
Carraízo: down 4 cm
Carraízo kept sliding. This morning’s chart puts it at 40.47 meters — down 4 centimeters from yesterday, in the seguridad band. The next line on the chart — into the observación band — sits at 39.70 meters, 0.77 meters below this morning’s reading. At this week’s pace that is about 22 days away (straight-line date: Oct 23 — a projection, not a forecast; one wet afternoon moves it).
Carraízo, October 1
- Level today
- 40.47 mband: seguridad
- Change since yesterday
- -4 cm
- To the observación line
- 0.77 mline at 39.70 m
- At the current pace
- about 22 daysstraight-line date: Oct 23
La Plata: down 9 cm
La Plata kept sliding. This morning’s chart puts it at 44.04 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, 3.54 meters below this morning’s reading. At AAA’s printed pace that is about 41 days away (straight-line date: Nov 11 — 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.
La Plata, October 1
- Level today
- 44.04 mband: ajustes
- Change since yesterday
- -9 cm
- To the control line
- 3.54 mline at 40.50 m
- At the current pace
- about 41 daysstraight-line date: Nov 11
The other rationing reservoir
Cidra, October 1
- Level today
- 400.54 mband: observación
- Change since yesterday
- +1 cm
- To the ajustes line
- 0.31 mline at 400.23 m
- At the current pace
- rising
Outlook
What the numbers say
Over the past week Carraízo has been falling an average of 3.5 cm a day, after a nearly flat week before. That is 6 straight mornings lower, -21 cm in all. Since the rotation began 55 days ago it has gained 283 cm, from 37.64 m. It sits 0.77 m above the observación line (the next band down), at 40.47 m in the seguridad band. At this week’s pace the observación line (39.70 m) is about 22 days away — around October 23; arithmetic, not a forecast. Nearby USGS gauges recorded 0.88 in of rain this week, most of it September 30 (0.53 in). After the 0.53 in on September 30, the next morning’s reading was -4 cm.
Over the past week La Plata has been falling an average of 8.7 cm a day, a turn from a 3.8 cm-a-day rise the week before. That is 9 straight mornings lower, -68 cm in all. Since August 8 it has lost 242 cm, from 46.46 m. It sits 3.54 m above the control line (the next band down), at 44.04 m in the ajustes band. At this week’s pace the control line (40.50 m) is about 41 days away — around November 11; arithmetic, not a forecast. Nearby USGS gauges recorded 1.01 in of rain this week; the wettest day was September 30 (0.5 in). After the 0.5 in on September 30, the next morning’s reading was -9 cm.
Over the past week Cidra has been rising an average of 0.2 cm a day. Since August 8 it has gained 39 cm, from 400.15 m. It sits 0.31 m above the ajustes line (the next band down), at 400.54 m in the observación band. The week’s net movement is inside chart-reading noise — effectively flat. Nearby USGS gauges recorded 1.43 in of rain this week; the wettest day was September 29 (0.68 in). After the 0.68 in on September 29, the next morning’s reading was +2 cm. After the 0.53 in on September 30, the next morning’s reading was +1 cm.
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.
Lake levels
The USGS gauge at Carraízo read 40.47 meters at 5:45 AM. The USGS gauge at La Plata read 44.03 meters at 5:45 AM. The USGS gauge at Cidra read 400.54 meters at 5:45 AM.
The gauges report every quarter hour and their readings are provisional; the bands are measured on AAA’s 5:00 chart.
Elsewhere today
- Water Rationing Begins for Several Naranjito Communities as Cedro Reservoirs Run Low, Primera Hora
- Drought Eases in Puerto Rico but Still Affects More Than Half the Island, Metro PR
- AAA Pledges to Finish Arecibo Pumping Station by November, NotiCel
- Loíza Mayor Asks for More AAA Credits After Water Service Interruptions, WAPA TV
- San Juan Mayor Romero Demands Criteria Behind AAA Water Credit, Calls It ‘Insufficient’, El Nuevo Día
How we read the data
This is the 49th 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.
Numbers from AAA’s Monitoreo Diario chart of Oct 1, 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 7, when the metro rotation took effect. Straight-line dates are arithmetic, not forecasts.
Corrected October 7: an earlier version counted the rotation from August 8; AAA’s plan began August 7, so this was day 56 and Carraízo had gained 283 cm since. It also gave two different dates for each reservoir’s next line; at this week’s pace they are around October 23 for Carraízo and November 11 for La Plata. And it said most of the week’s rain at La Plata and Cidra fell on one day; no single day carried most of it.