Toa Vaca crossed into the Watch band (Observación) this morning, at 146.99 meters. This morning’s 5:00 chart from AAA shows Carraízo at 40.85 meters, down 2 centimeters from yesterday.
Service today
Day 72 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 is in effect: Zone C and Zone D take turns every 48 hours; Zone C has water until Sunday 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 2 cm
Carraízo slipped overnight. This morning’s chart puts it at 40.85 meters, down 2 centimeters from yesterday, in the Safe band (Seguridad). The next line on the chart, into the Watch band, sits at 39.70 meters, 1.15 meters below this morning’s reading.
Show the numbers
- Aug 19, 37.63 m, 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 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 11, 1.11 in of rain
- Oct 13, 1.33 in of rain
- Oct 14, 0.7 in of rain
- Oct 16, 0.01 in of rain
Carraízo, October 17
- Level today
- 40.85 mSafe band
- Change since yesterday
- −2 cm
- To the Watch line
- 1.15 mline at 39.70 m
- At this week's pace
- months awaythe decline is very shallow
La Plata: down 10 cm
La Plata kept sliding. This morning’s chart puts it at 43.29 meters, down 10 centimeters from yesterday, in the Adjustments band (Ajustes). The next line on the chart, into the Control band, sits at 40.50 meters, 2.79 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
- Aug 19, 45.62 m, 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 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 11, 0.11 in of rain
- Oct 13, 0.74 in of rain
- Oct 14, 0.01 in of rain
- Oct 15, 0.01 in of rain
La Plata, October 17
- Level today
- 43.29 mAdjustments band
- Change since yesterday
- −10 cm
- To the Control line
- 2.79 mline at 40.50 m
- At this week's pace
- months awaythe decline is very shallow
Cidra: the other rationing reservoir
- Level today
- 400.64 mWatch band
- Change since yesterday
- 0 cm
- To the Adjustments line
- 0.41 mline at 400.23 m
- At this week's pace
- holding
Outlook
What the numbers say
Over the past week Carraízo has been falling an average of 1.8 cm a day, a turn from a 2.8 cm-a-day rise the week before. Since the rotation began 71 days ago it has gained 321 cm, from 37.64 m. It sits 1.15 m above the Watch line (the next band down), at 40.85 m in the Safe band. At this week’s pace the Watch line (39.70 m) is more than two months away; arithmetic, not a forecast. Gauges USGS runs nearby recorded 3.15 in of rain this week; the wettest day was October 13 (1.33 in). After the 1.11 in on October 11, the next morning’s reading was -10 cm. After the 1.33 in on October 13, the next morning’s reading was +4 cm.
Over the past week La Plata has been falling an average of 3.5 cm a day, down from 4.5 cm a day the week before: the decline is slowing. That is 3 straight mornings lower, -21 cm in all. Since August 7 it has lost 326 cm, from 46.55 m. It sits 2.79 m above the Control line (the next band down), at 43.29 m in the Adjustments band. At this week’s pace the Control line (40.50 m) is more than two months away; arithmetic, not a forecast. Gauges USGS runs nearby recorded 0.87 in of rain this week, most of it October 13 (0.74 in). After the 0.74 in on October 13, the next morning’s reading was +5 cm.
Over the past week Cidra has been falling an average of 0.2 cm a day. Since August 7 it has gained 47 cm, from 400.17 m. It sits 0.41 m above the Adjustments line (the next band down), at 400.64 m in the Watch band. The week’s net movement is inside chart-reading noise: effectively flat. Gauges USGS runs nearby recorded 2.37 in of rain this week; the wettest day was October 11 (1.16 in). After the 1.16 in on October 11, the next morning’s reading was +1 cm. After the 0.7 in on October 14, the next morning’s reading was 0 cm.
What to watch
- La Plata: whether the slowdown holds. A second week under 4.5 cm a day would show the decline easing.
- 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 40.85 meters at 5:45 AM. The gauge USGS runs at La Plata read 43.27 meters at 5:45 AM. The gauge USGS runs at Cidra read 400.64 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 62nd Daily Water Watch (yesterday’s is here). The levels update every morning on the water page.
Levels: AAA’s daily reservoir chart, October 17. 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.