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Daily Water Watch: Carraízo at 40.84 m

Published Nov 11, 2026, 6:05 AM AST787daily · Original analysis

At a glance

  • Carraízo fell 6 cm to 40.84 m, in the Safe band (Seguridad), 1.14 m above the Watch line (Observación)
  • La Plata rose 22 cm to 43.15 m, in the Adjustments band (Ajustes), 2.65 m above the Control line
  • Carraízo is flat, averaging 0.2 cm a day over the past week; 5.3 in of rain over the watershed this week
  • Day 97 of the metro rotation, the San Juan area’s rationing schedule, with interruptions paused since September 2, and the Puerto Rico Aqueduct and Sewer Authority (AAA) has not canceled it; the plan began August 7; levels from the chart AAA publishes at 5:00 AM

Why this matters: The number that matters is the gap to the next band line: 1.14 m for Carraízo, 2.65 m for La Plata. Straight-line dates move every day; the daily check is the point.

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This morning’s 5:00 chart from AAA shows Carraízo at 40.84 meters, down 6 centimeters from yesterday. La Plata is at 43.15 meters, up 22 centimeters from yesterday.

Service today

Day 97 of the metro rotation, the San Juan area’s rationing schedule, with interruptions paused since September 2, and AAA has not canceled it.

AAA’s Cedro Arriba plan in Naranjito: AAA’s published calendar has run out; AAA has not said what follows.

AAA has posted no plan change, open outage or water-quality notice in the last three days.

Every notice AAA posts is on the water page, in its own words.

Reservoirs

Carraízo: down 6 cm

Carraízo slipped overnight. This morning’s chart puts it at 40.84 meters, down 6 centimeters from yesterday, in the Safe band (Seguridad). The next line on the chart, into the Watch band (Observación), sits at 39.70 meters, 1.14 meters below this morning’s reading.

Adjustments Watch Safe 37.0 37.5 38.0 38.5 39.0 39.5 40.0 40.5 41.0 Sep 13 Oct 12 Nov 11 Oct 3, 40.70 m, USGS gauge at 5 AM, Safe Sep 13, 39.14 m, WatchSep 14, 39.16 m, +2 cm, WatchSep 15, 39.25 m, +9 cm, WatchSep 16, 39.23 m, −2 cm, WatchSep 17, 40.06 m, +83 cm, SafeSep 18, 40.64 m, +58 cm, SafeSep 19, 40.80 m, +16 cm, SafeSep 20, 40.81 m, +1 cm, SafeSep 21, 40.79 m, −2 cm, SafeSep 22, 40.75 m, −4 cm, SafeSep 23, 40.70 m, −5 cm, SafeSep 24, 40.68 m, −2 cm, SafeSep 25, 40.68 m, +0 cm, SafeSep 26, 40.67 m, −1 cm, SafeSep 27, 40.63 m, −4 cm, SafeSep 28, 40.58 m, −5 cm, SafeSep 29, 40.53 m, −5 cm, SafeSep 30, 40.51 m, −2 cm, SafeOct 1, 40.47 m, −4 cm, SafeOct 2, 40.60 m, +13 cm, SafeOct 4, 40.74 m, +4 cm, SafeOct 5, 40.72 m, −2 cm, SafeOct 6, 40.69 m, −3 cm, SafeOct 7, 40.65 m, −4 cm, SafeOct 8, 40.88 m, +23 cm, SafeOct 9, 40.94 m, +6 cm, SafeOct 10, 40.91 m, −3 cm, SafeOct 11, 40.96 m, +5 cm, SpillingOct 12, 40.86 m, −10 cm, SafeOct 13, 40.90 m, +4 cm, SafeOct 14, 40.94 m, +4 cm, SafeOct 15, 40.85 m, −9 cm, SafeOct 16, 40.87 m, +2 cm, SafeOct 17, 40.85 m, −2 cm, SafeOct 18, 40.85 m, +0 cm, SafeOct 19, 40.87 m, +2 cm, SafeOct 20, 40.86 m, −1 cm, SafeOct 21, 40.88 m, +2 cm, SafeOct 22, 40.85 m, −3 cm, SafeOct 23, 40.81 m, −4 cm, SafeOct 24, 40.77 m, −4 cm, SafeOct 25, 40.75 m, −2 cm, SafeOct 26, 40.75 m, +0 cm, SafeOct 27, 40.73 m, −2 cm, SafeOct 28, 40.77 m, +4 cm, SafeOct 29, 40.76 m, −1 cm, SafeOct 30, 40.75 m, −1 cm, SafeOct 31, 40.72 m, −3 cm, SafeNov 1, 40.74 m, +2 cm, SafeNov 2, 40.72 m, −2 cm, SafeNov 3, 40.72 m, +0 cm, SafeNov 4, 40.70 m, −2 cm, SafeNov 5, 40.85 m, +15 cm, SafeNov 6, 40.84 m, −1 cm, SafeNov 7, 40.83 m, −1 cm, SafeNov 8, 40.96 m, +13 cm, SpillingNov 9, 40.88 m, −8 cm, SafeNov 10, 40.90 m, +2 cm, SafeNov 11, 40.84 m, −6 cm, Safe 40.84 m Nov 5, 0.11 in of rainNov 6, 0.09 in of rainNov 7, 1.01 in of rainNov 8, 1.72 in of rainNov 9, 2.36 in of rainNov 10, 0.01 in of rain rain to 2.36 in
Carraízo since Sep 13, meters above sea level, shaded by AAA alert band, with daily rain from gauges the U.S. Geological Survey (USGS) runs within 12 km. Data: AAA Monitoreo Diario; hollow points are the USGS gauge's 5 AM reading on mornings AAA's chart has none (AAA's own record here starts Sep 13).
Show the numbers
  • Sep 13, 39.14 m, Watch
  • Sep 14, 39.16 m, +2 cm, Watch
  • Sep 15, 39.25 m, +9 cm, Watch
  • Sep 16, 39.23 m, −2 cm, Watch
  • Sep 17, 40.06 m, +83 cm, Safe
  • Sep 18, 40.64 m, +58 cm, Safe
  • Sep 19, 40.80 m, +16 cm, Safe
  • Sep 20, 40.81 m, +1 cm, Safe
  • Sep 21, 40.79 m, −2 cm, Safe
  • Sep 22, 40.75 m, −4 cm, Safe
  • Sep 23, 40.70 m, −5 cm, Safe
  • Sep 24, 40.68 m, −2 cm, Safe
  • Sep 25, 40.68 m, +0 cm, Safe
  • Sep 26, 40.67 m, −1 cm, Safe
  • Sep 27, 40.63 m, −4 cm, Safe
  • Sep 28, 40.58 m, −5 cm, Safe
  • Sep 29, 40.53 m, −5 cm, Safe
  • Sep 30, 40.51 m, −2 cm, Safe
  • Oct 1, 40.47 m, −4 cm, Safe
  • Oct 2, 40.60 m, +13 cm, Safe
  • Oct 3, 40.70 m, USGS gauge at 5 AM, Safe
  • Oct 4, 40.74 m, +4 cm, Safe
  • Oct 5, 40.72 m, −2 cm, Safe
  • Oct 6, 40.69 m, −3 cm, Safe
  • Oct 7, 40.65 m, −4 cm, Safe
  • Oct 8, 40.88 m, +23 cm, Safe
  • Oct 9, 40.94 m, +6 cm, Safe
  • Oct 10, 40.91 m, −3 cm, Safe
  • Oct 11, 40.96 m, +5 cm, Spilling
  • Oct 12, 40.86 m, −10 cm, Safe
  • Oct 13, 40.90 m, +4 cm, Safe
  • Oct 14, 40.94 m, +4 cm, Safe
  • Oct 15, 40.85 m, −9 cm, Safe
  • Oct 16, 40.87 m, +2 cm, Safe
  • Oct 17, 40.85 m, −2 cm, Safe
  • Oct 18, 40.85 m, +0 cm, Safe
  • Oct 19, 40.87 m, +2 cm, Safe
  • Oct 20, 40.86 m, −1 cm, Safe
  • Oct 21, 40.88 m, +2 cm, Safe
  • Oct 22, 40.85 m, −3 cm, Safe
  • Oct 23, 40.81 m, −4 cm, Safe
  • Oct 24, 40.77 m, −4 cm, Safe
  • Oct 25, 40.75 m, −2 cm, Safe
  • Oct 26, 40.75 m, +0 cm, Safe
  • Oct 27, 40.73 m, −2 cm, Safe
  • Oct 28, 40.77 m, +4 cm, Safe
  • Oct 29, 40.76 m, −1 cm, Safe
  • Oct 30, 40.75 m, −1 cm, Safe
  • Oct 31, 40.72 m, −3 cm, Safe
  • Nov 1, 40.74 m, +2 cm, Safe
  • Nov 2, 40.72 m, −2 cm, Safe
  • Nov 3, 40.72 m, +0 cm, Safe
  • Nov 4, 40.70 m, −2 cm, Safe
  • Nov 5, 40.85 m, +15 cm, Safe
  • Nov 6, 40.84 m, −1 cm, Safe
  • Nov 7, 40.83 m, −1 cm, Safe
  • Nov 8, 40.96 m, +13 cm, Spilling
  • Nov 9, 40.88 m, −8 cm, Safe
  • Nov 10, 40.90 m, +2 cm, Safe
  • Nov 11, 40.84 m, −6 cm, Safe
  • Nov 5, 0.11 in of rain
  • Nov 6, 0.09 in of rain
  • Nov 7, 1.01 in of rain
  • Nov 8, 1.72 in of rain
  • Nov 9, 2.36 in of rain
  • Nov 10, 0.01 in of rain

Carraízo, November 11

Level today
40.84 mSafe band
Change since yesterday
−6 cm
To the Watch line
1.14 mline at 39.70 m
At this week's pace
holding

La Plata: a rise

La Plata gained ground overnight. This morning’s chart puts it at 43.15 meters, up 22 centimeters from yesterday, in the Adjustments band (Ajustes). The next line on the chart, into the Control band, sits at 40.50 meters, 2.65 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.

Adjustments Watch Safe 40 42 44 46 48 50 52 Sep 13 Oct 12 Nov 11 Oct 3, 43.87 m, USGS gauge at 5 AM, Adjustments Sep 13, 44.26 m, AdjustmentsSep 14, 44.40 m, +14 cm, AdjustmentsSep 15, 44.46 m, +6 cm, AdjustmentsSep 16, 44.40 m, −6 cm, AdjustmentsSep 17, 44.36 m, −4 cm, AdjustmentsSep 18, 44.40 m, +4 cm, AdjustmentsSep 19, 44.61 m, +21 cm, AdjustmentsSep 20, 44.66 m, +5 cm, AdjustmentsSep 21, 44.70 m, +4 cm, AdjustmentsSep 22, 44.72 m, +2 cm, AdjustmentsSep 23, 44.68 m, −4 cm, AdjustmentsSep 24, 44.63 m, −5 cm, AdjustmentsSep 25, 44.56 m, −7 cm, AdjustmentsSep 26, 44.47 m, −9 cm, AdjustmentsSep 27, 44.39 m, −8 cm, AdjustmentsSep 28, 44.31 m, −8 cm, AdjustmentsSep 29, 44.22 m, −9 cm, AdjustmentsSep 30, 44.13 m, −9 cm, AdjustmentsOct 1, 44.04 m, −9 cm, AdjustmentsOct 2, 43.96 m, −8 cm, AdjustmentsOct 4, 43.79 m, −8 cm, AdjustmentsOct 5, 43.71 m, −8 cm, AdjustmentsOct 6, 43.70 m, −1 cm, AdjustmentsOct 7, 43.68 m, −2 cm, AdjustmentsOct 8, 43.62 m, −6 cm, AdjustmentsOct 9, 43.54 m, −8 cm, AdjustmentsOct 10, 43.52 m, −2 cm, AdjustmentsOct 11, 43.50 m, −2 cm, AdjustmentsOct 12, 43.45 m, −5 cm, AdjustmentsOct 13, 43.45 m, +0 cm, AdjustmentsOct 14, 43.50 m, +5 cm, AdjustmentsOct 15, 43.47 m, −3 cm, AdjustmentsOct 16, 43.39 m, −8 cm, AdjustmentsOct 17, 43.29 m, −10 cm, AdjustmentsOct 18, 43.18 m, −11 cm, AdjustmentsOct 19, 43.07 m, −11 cm, AdjustmentsOct 20, 43.00 m, −7 cm, AdjustmentsOct 21, 43.06 m, +6 cm, AdjustmentsOct 22, 42.97 m, −9 cm, AdjustmentsOct 23, 42.87 m, −10 cm, AdjustmentsOct 24, 42.76 m, −11 cm, AdjustmentsOct 25, 42.64 m, −12 cm, AdjustmentsOct 26, 42.52 m, −12 cm, AdjustmentsOct 27, 42.40 m, −12 cm, AdjustmentsOct 28, 42.28 m, −12 cm, AdjustmentsOct 29, 42.27 m, −1 cm, AdjustmentsOct 30, 42.27 m, +0 cm, AdjustmentsOct 31, 42.20 m, −7 cm, AdjustmentsNov 1, 42.12 m, −8 cm, AdjustmentsNov 2, 42.04 m, −8 cm, AdjustmentsNov 3, 41.94 m, −10 cm, AdjustmentsNov 4, 41.83 m, −11 cm, AdjustmentsNov 5, 41.78 m, −5 cm, AdjustmentsNov 6, 41.84 m, +6 cm, AdjustmentsNov 7, 42.10 m, +26 cm, AdjustmentsNov 8, 42.38 m, +28 cm, AdjustmentsNov 9, 42.51 m, +13 cm, AdjustmentsNov 10, 42.93 m, +42 cm, AdjustmentsNov 11, 43.15 m, +22 cm, Adjustments 43.15 m Nov 5, 0.74 in of rainNov 6, 0.28 in of rainNov 7, 0.88 in of rainNov 8, 0.65 in of rainNov 9, 0.46 in of rainNov 10, 0.01 in of rain rain to 0.88 in
La Plata since Sep 13, meters above sea level, shaded by AAA alert band, with daily rain from gauges USGS runs within 12 km. Data: AAA Monitoreo Diario; hollow points are the USGS gauge's 5 AM reading on mornings AAA's chart has none (AAA's own record here starts Sep 13).
Show the numbers
  • Sep 13, 44.26 m, Adjustments
  • Sep 14, 44.40 m, +14 cm, Adjustments
  • Sep 15, 44.46 m, +6 cm, Adjustments
  • Sep 16, 44.40 m, −6 cm, Adjustments
  • Sep 17, 44.36 m, −4 cm, Adjustments
  • Sep 18, 44.40 m, +4 cm, Adjustments
  • Sep 19, 44.61 m, +21 cm, Adjustments
  • Sep 20, 44.66 m, +5 cm, Adjustments
  • Sep 21, 44.70 m, +4 cm, Adjustments
  • Sep 22, 44.72 m, +2 cm, Adjustments
  • Sep 23, 44.68 m, −4 cm, Adjustments
  • Sep 24, 44.63 m, −5 cm, Adjustments
  • Sep 25, 44.56 m, −7 cm, Adjustments
  • Sep 26, 44.47 m, −9 cm, Adjustments
  • Sep 27, 44.39 m, −8 cm, Adjustments
  • Sep 28, 44.31 m, −8 cm, Adjustments
  • Sep 29, 44.22 m, −9 cm, Adjustments
  • Sep 30, 44.13 m, −9 cm, Adjustments
  • Oct 1, 44.04 m, −9 cm, Adjustments
  • Oct 2, 43.96 m, −8 cm, Adjustments
  • Oct 3, 43.87 m, USGS gauge at 5 AM, Adjustments
  • Oct 4, 43.79 m, −8 cm, Adjustments
  • Oct 5, 43.71 m, −8 cm, Adjustments
  • Oct 6, 43.70 m, −1 cm, Adjustments
  • Oct 7, 43.68 m, −2 cm, Adjustments
  • Oct 8, 43.62 m, −6 cm, Adjustments
  • Oct 9, 43.54 m, −8 cm, Adjustments
  • Oct 10, 43.52 m, −2 cm, Adjustments
  • Oct 11, 43.50 m, −2 cm, Adjustments
  • Oct 12, 43.45 m, −5 cm, Adjustments
  • Oct 13, 43.45 m, +0 cm, Adjustments
  • Oct 14, 43.50 m, +5 cm, Adjustments
  • Oct 15, 43.47 m, −3 cm, Adjustments
  • Oct 16, 43.39 m, −8 cm, Adjustments
  • Oct 17, 43.29 m, −10 cm, Adjustments
  • Oct 18, 43.18 m, −11 cm, Adjustments
  • Oct 19, 43.07 m, −11 cm, Adjustments
  • Oct 20, 43.00 m, −7 cm, Adjustments
  • Oct 21, 43.06 m, +6 cm, Adjustments
  • Oct 22, 42.97 m, −9 cm, Adjustments
  • Oct 23, 42.87 m, −10 cm, Adjustments
  • Oct 24, 42.76 m, −11 cm, Adjustments
  • Oct 25, 42.64 m, −12 cm, Adjustments
  • Oct 26, 42.52 m, −12 cm, Adjustments
  • Oct 27, 42.40 m, −12 cm, Adjustments
  • Oct 28, 42.28 m, −12 cm, Adjustments
  • Oct 29, 42.27 m, −1 cm, Adjustments
  • Oct 30, 42.27 m, +0 cm, Adjustments
  • Oct 31, 42.20 m, −7 cm, Adjustments
  • Nov 1, 42.12 m, −8 cm, Adjustments
  • Nov 2, 42.04 m, −8 cm, Adjustments
  • Nov 3, 41.94 m, −10 cm, Adjustments
  • Nov 4, 41.83 m, −11 cm, Adjustments
  • Nov 5, 41.78 m, −5 cm, Adjustments
  • Nov 6, 41.84 m, +6 cm, Adjustments
  • Nov 7, 42.10 m, +26 cm, Adjustments
  • Nov 8, 42.38 m, +28 cm, Adjustments
  • Nov 9, 42.51 m, +13 cm, Adjustments
  • Nov 10, 42.93 m, +42 cm, Adjustments
  • Nov 11, 43.15 m, +22 cm, Adjustments
  • Nov 5, 0.74 in of rain
  • Nov 6, 0.28 in of rain
  • Nov 7, 0.88 in of rain
  • Nov 8, 0.65 in of rain
  • Nov 9, 0.46 in of rain
  • Nov 10, 0.01 in of rain

La Plata, November 11

Level today
43.15 mAdjustments band
Change since yesterday
+22 cm
To the Control line
2.65 mline at 40.50 m
This morning
rising

Cidra: the other rationing reservoir

Level today
400.95 mWatch band
Change since yesterday
0 cm
To the Adjustments line
0.72 mline at 400.23 m
At this week's pace
rising

Outlook

What the numbers say

The week’s rain did not lift every reservoir equally. La Plata took the clearest benefit: it has risen six mornings in a row, a sharp turnaround from the decline of the week before, and its biggest single-morning gain came on November 10. Carraízo, by contrast, has essentially stalled. Its week is inside chart-reading noise, and the heaviest rain (2.36 inches on November 9) bought it only a small gain the next morning. Cidra sits between the two, creeping upward with rises on the days after the heavier rain but little to show for the lighter days.

For the next band lines, the projections are arithmetic at this week’s pace, not forecasts. La Plata’s rise, if it held, would carry it into the Watch band in about 8 days, but a run this steep usually eases once the runoff passes, so that date is the optimistic end of the range. Cidra’s slower climb puts the Safe line more than a month out, around December 16. Carraízo has no projection because its week shows no real direction. It stays comfortably in seguridad, well above the next line down.

What to watch

  • La Plata: whether the rise survives a dry week. This week’s gain came with 3.02 in of rain nearby.
  • Cidra: whether the rise survives a dry week. This week’s gain came with 4.91 in of rain nearby.
  • Naranjito: whether AAA extends its Cedro Arriba plan (the calendar runs through October 31), changes the phase or ends it.

Lake levels

The gauge USGS runs at Carraízo read 40.84 meters at 5:45 AM. The gauge USGS runs at La Plata read 43.17 meters at 5:45 AM. The gauge USGS runs at Cidra read 400.95 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

How we read the data

This is the 83rd Daily Water Watch (yesterday’s is here). The levels update every morning on the water page.

Levels: AAA’s daily reservoir chart, November 11. Rain: gauges USGS runs within 12 km of each reservoir. Day counts start August 7, when the metro rotation took effect. Straight-line dates are arithmetic, not forecasts. How we report.

In context

About this analysisOriginal 787daily analysis of AAA's 5 AM reservoir chart, validated daily · Report an error
Cite this

Source: 787daily, “Daily Water Watch: Carraízo at 40.84 m”, Nov 11, 2026, https://787daily.com/news/2026-11-11-daily-water-watch-carraizo-at-40-84-m/

Numbers from
AAA's 5 AM reservoir chart, validated daily
Use our data
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Every Daily Water Watch

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Background

About Daily Water Watch

Each morning's reading of the 19 AAA reservoirs: today's level, the day-over-day change, the alert band and the pace to the next line, with metro rationing status.

Published
Daily
Source
AAA's 5 AM reservoir chart, validated daily
Water

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