This morning’s 5:00 chart from the Puerto Rico Aqueduct and Sewer Authority (AAA) shows Carraízo at 40.91 meters — down 3 centimeters from yesterday. La Plata is at 43.52 meters — down 2 centimeters from yesterday.
Service today
Day 65 of the metro rotation, the San Juan area’s rationing schedule — interruptions paused since September 2, and AAA has not canceled it.
AAA’s Cedro Arriba plan in Naranjito is in effect: Zone C and Zone D take turns every 48 hours; Zone D has water until Monday at 6:00 AM.
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 3 cm
Carraízo slipped overnight. This morning’s chart puts it at 40.91 meters — down 3 centimeters from yesterday, in the Safe band (Seguridad). The next line on the chart — into the Watch band (Observación) — sits at 39.70 meters, 1.21 meters below this morning’s reading.
Show the numbers
- Oct 3, 40.70 m, USGS gauge at 5 AM, Safe
- Aug 12, 37.53 m, Adjustments
- Aug 13, 37.79 m, +26 cm, Adjustments
- Aug 14, 37.86 m, +7 cm, Adjustments
- Aug 15, 37.85 m, −1 cm, Adjustments
- Aug 16, 37.82 m, −3 cm, Adjustments
- Aug 17, 37.76 m, −6 cm, Adjustments
- Aug 18, 37.69 m, −7 cm, Adjustments
- Aug 19, 37.63 m, −6 cm, Adjustments
- Aug 20, 37.57 m, −6 cm, Adjustments
- Aug 21, 37.52 m, −5 cm, Adjustments
- Aug 22, 37.46 m, −6 cm, Adjustments
- Aug 23, 37.41 m, −5 cm, Adjustments
- Aug 24, 37.34 m, −7 cm, Adjustments
- Aug 25, 37.32 m, −2 cm, Adjustments
- Aug 26, 37.30 m, −2 cm, Adjustments
- Aug 27, 37.26 m, −4 cm, Adjustments
- Aug 28, 37.20 m, −6 cm, Adjustments
- Aug 29, 37.14 m, −6 cm, Adjustments
- Aug 30, 37.07 m, −7 cm, Adjustments
- Aug 31, 37.14 m, +7 cm, Adjustments
- Sep 1, 37.20 m, +6 cm, Adjustments
- Sep 2, 38.92 m, +172 cm, Watch
- Sep 3, 39.11 m, +19 cm, Watch
- Sep 4, 39.09 m, −2 cm, Watch
- Sep 5, 39.01 m, −8 cm, Watch
- Sep 6, 38.94 m, −7 cm, Watch
- Sep 7, 38.87 m, −7 cm, Watch
- Sep 8, 38.83 m, −4 cm, Watch
- Sep 9, 39.02 m, +19 cm, Watch
- Sep 10, 39.07 m, +5 cm, Watch
- Sep 11, 39.20 m, +13 cm, Watch
- Sep 12, 39.19 m, −1 cm, Watch
- Sep 13, 39.14 m, −5 cm, 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 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 4, 0.04 in of rain
- Oct 5, 0.08 in of rain
- Oct 6, 0.24 in of rain
- Oct 7, 0.8 in of rain
- Oct 8, 0.13 in of rain
- Oct 9, 0.05 in of rain
Carraízo, October 10
- Level today
- 40.91 mSafe band
- Change since yesterday
- −3 cm
- To the Watch line
- 1.21 mline at 39.70 m
- At this week's pace
- rising
La Plata: down 2 cm
La Plata kept sliding. This morning’s chart puts it at 43.52 meters — down 2 centimeters from yesterday, in the Adjustments band (Ajustes). The next line on the chart — into the Control band — sits at 40.50 meters, 3.02 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.
Show the numbers
- Oct 3, 43.87 m, USGS gauge at 5 AM, Adjustments
- Aug 12, 46.16 m, Watch
- Aug 13, 46.11 m, −5 cm, Watch
- Aug 14, 46.02 m, −9 cm, Watch
- Aug 15, 45.95 m, −7 cm, Watch
- Aug 16, 45.88 m, −7 cm, Watch
- Aug 17, 45.80 m, −8 cm, Watch
- Aug 18, 45.71 m, −9 cm, Watch
- Aug 19, 45.62 m, −9 cm, Watch
- Aug 20, 45.55 m, −7 cm, Watch
- Aug 21, 45.49 m, −6 cm, Watch
- Aug 22, 45.42 m, −7 cm, Watch
- Aug 23, 45.35 m, −7 cm, Watch
- Aug 24, 45.28 m, −7 cm, Watch
- Aug 25, 45.23 m, −5 cm, Watch
- Aug 26, 45.15 m, −8 cm, Watch
- Aug 27, 45.04 m, −11 cm, Watch
- Aug 28, 44.93 m, −11 cm, Watch
- Aug 29, 44.83 m, −10 cm, Adjustments
- Aug 30, 44.72 m, −11 cm, Adjustments
- Aug 31, 44.67 m, −5 cm, Adjustments
- Sep 1, 44.59 m, −8 cm, Adjustments
- Sep 2, 44.59 m, +0 cm, Adjustments
- Sep 3, 44.59 m, +0 cm, Adjustments
- Sep 4, 44.57 m, −2 cm, Adjustments
- Sep 5, 44.54 m, −3 cm, Adjustments
- Sep 6, 44.52 m, −2 cm, Adjustments
- Sep 7, 44.46 m, −6 cm, Adjustments
- Sep 8, 44.40 m, −6 cm, Adjustments
- Sep 9, 44.32 m, −8 cm, Adjustments
- Sep 10, 44.24 m, −8 cm, Adjustments
- Sep 11, 44.14 m, −10 cm, Adjustments
- Sep 12, 44.25 m, +11 cm, Adjustments
- Sep 13, 44.26 m, +1 cm, 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 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 4, 0.84 in of rain
- Oct 5, 0.02 in of rain
- Oct 6, 0.19 in of rain
- Oct 7, 0.24 in of rain
- Oct 8, 0.02 in of rain
- Oct 9, 0.15 in of rain
- Oct 10, 0.01 in of rain
La Plata, October 10
- Level today
- 43.52 mAdjustments band
- Change since yesterday
- −2 cm
- To the Control line
- 3.02 mline at 40.50 m
- At this week's pace
- months awaythe decline is very shallow
The other rationing reservoir
Cidra, October 10
- Level today
- 400.61 mWatch band
- Change since yesterday
- 0 cm
- To the Adjustments line
- 0.38 mline at 400.23 m
- At this week's pace
- rising
Outlook
What the numbers say
The week’s pattern is a split. Carraízo and Cidra are both rising, while La Plata is still falling, though the slide has eased. Carraízo is the clearest beneficiary of the rain: the morning after the October 7 downpour its level jumped 23 cm, the biggest single-morning rise in the past two weeks, and it is now close enough to the Spilling line (Desborde) that this week’s pace would carry it across in about 1 day. That is arithmetic, not a forecast, and today’s 3 cm dip is a reminder that a single dry morning can interrupt the climb.
La Plata tells a different story. It has now fallen 18 mornings in a row, and the 8.7 cm a day lost the week before has shrunk to 4.5 cm a day. Rain there barely registered: the morning after the week’s wettest day, the level still dropped 8 cm. At this week’s pace the Control line is more than two months away, so the slowdown buys time rather than a recovery. Cidra is gaining slowly and steadily, but its gains are small against how far the next band up remains, which at the current pace is also more than two months off.
What to watch
- Carraízo: whether the rise survives a dry week — this week’s gain came with 1.34 in of rain nearby.
- La Plata: whether the slowdown holds — a second week under 8.7 cm a day would show the decline easing.
- Cidra: whether the rise survives a dry week — this week’s gain came with 3.57 in of rain nearby.
- 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.
- Naranjito: AAA’s Cedro Arriba plan — its calendar runs through October 31; whether AAA extends it, changes the phase or ends it.
Lake levels
The USGS gauge at Carraízo read 40.91 meters at 5:45 AM. The USGS gauge at La Plata read 43.51 meters at 5:45 AM. The USGS gauge at Cidra read 400.61 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.
How we read the data
This is the 56th Daily Water Watch (yesterday’s is here). The levels update every morning on the water page.
Levels: AAA’s daily reservoir chart, October 10. Rain: USGS gauges 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.