This morning’s 5:00 chart from the Puerto Rico Aqueduct and Sewer Authority (AAA) shows Carraízo at 40.94 meters — up 6 centimeters from yesterday. La Plata is at 43.54 meters — down 8 centimeters from yesterday.
Service today
Day 64 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 C has water until Saturday 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: a rise
Carraízo gained ground overnight. This morning’s chart puts it at 40.94 meters — up 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, 1.24 meters below this morning’s reading.
Show the numbers
- Oct 3, 40.70 m, USGS gauge at 5 AM, Safe
- Aug 11, 37.43 m, Adjustments
- Aug 12, 37.53 m, +10 cm, 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 3, 0.03 in of rain
- 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
Carraízo, October 9
- Level today
- 40.94 mSafe band
- Change since yesterday
- +6 cm
- To the Watch line
- 1.24 mline at 39.70 m
- This morning
- rising
La Plata: down 8 cm
La Plata kept sliding. This morning’s chart puts it at 43.54 meters — down 8 centimeters from yesterday, in the Adjustments band (Ajustes). The next line on the chart — into the Control band — sits at 40.50 meters, 3.04 meters below this morning’s reading. At this week’s pace that is about 55 days away (straight-line date: December 4 — 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.
Show the numbers
- Oct 3, 43.87 m, USGS gauge at 5 AM, Adjustments
- Aug 11, 46.20 m, Watch
- Aug 12, 46.16 m, −4 cm, 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 3, 0.01 in of rain
- 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
La Plata, October 9
- Level today
- 43.54 mAdjustments band
- Change since yesterday
- −8 cm
- To the Control line
- 3.04 mline at 40.50 m
- At this week's pace
- about 55 daysstraight-line date: December 4
The other rationing reservoir
Cidra, October 9
- Level today
- 400.61 mWatch band
- Change since yesterday
- +1 cm
- To the Adjustments line
- 0.38 mline at 400.23 m
- This morning
- rising
Outlook
What the numbers say
The week’s pattern splits cleanly. Carraízo has turned from a slow decline to a clear rise, and the rain on October 7 is the reason: the next morning’s reading jumped 23 cm, its biggest single-morning gain of the past two weeks. That puts it within reach of the Spilling line (40.95 m) at its current level of 40.94 m, which at this week’s pace is arithmetic pointing to around October 10, not a forecast. Cidra is also rising, though slowly, and the same storm gave it only a modest bump. Its climb toward the Safe line is more than two months out at this pace.
La Plata tells a different story. It has now fallen 17 mornings in a row, and a similar amount of rain barely registered, with the next morning still down 8 cm. The decline is slowing, from 8.5 cm a day to 5.5, which is a mild improvement, but it is still losing water. At this week’s pace the Control line is about 55 days away, around December 4, which is arithmetic, not a forecast.
What to watch
- Carraízo: whether the rise survives a dry week — this week’s gain came with 1.32 in of rain nearby.
- La Plata: whether the slowdown holds — a second week under 8.5 cm a day would show the decline easing.
- Cidra: whether the rise survives a dry week — this week’s gain came with 3.81 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.
Drought map
The US Drought Monitor map dated October 6 puts 45 of 78 municipios in at least moderate drought (D1). The worst tier, D3 extreme drought, covers 11 of them, led by Guánica, Santa Isabel and Lajas. Since the map of September 29, no municipio worsened and 11 improved, while 67 stayed in the same category. The biggest move: Vieques (extreme drought to severe drought).
Where the map is worst
| Municipio | Category | Share of area (Share of the municipio's area at this category or worse) |
|---|---|---|
| Guánica | D3 extreme drought | 100% |
| Santa Isabel | D3 extreme drought | 95.7% |
| Lajas | D3 extreme drought | 90% |
| Guayanilla | D3 extreme drought | 57.1% |
| Cabo Rojo | D3 extreme drought | 40.6% |
| Juana Díaz | D3 extreme drought | 40.6% |
| Ponce | D3 extreme drought | 39.2% |
| Peñuelas | D3 extreme drought | 31.3% |
The 8 municipios with the largest share of their area at D3, of 11 in that tier.
Since the map of September 29
| Municipio | Last map (Worst category on the map of September 29) | This map (Worst category on this map) |
|---|---|---|
| Vieques | D3 extreme drought | D2 severe drought |
| Dorado | D2 severe drought | D1 moderate drought |
| Toa Baja | D2 severe drought | D1 moderate drought |
| Ceiba | D1 moderate drought | D0 abnormally dry |
| Fajardo | D1 moderate drought | D0 abnormally dry |
| Humacao | D1 moderate drought | D0 abnormally dry |
| Luquillo | D1 moderate drought | D0 abnormally dry |
| Naguabo | D1 moderate drought | D0 abnormally dry |
| Yabucoa | D1 moderate drought | D0 abnormally dry |
| Hormigueros | D0 abnormally dry | No drought |
| Vega Alta | D0 abnormally dry | No drought |
USDM categories are a weekly expert synthesis of drought indicators, not a rainfall total; municipio shares are area-weighted. The full map, colored by category, is on the water page.
Lake levels
The USGS gauge at Carraízo read 40.92 meters at 5:45 AM. The USGS gauge at La Plata read 43.54 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 55th Daily Water Watch (yesterday’s is here). The levels update every morning on the water page.
Levels: AAA’s daily reservoir chart, October 9. 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.