Reservoir · California · United States · CDEC
PERRIS
95.3% full
Capacity
162.14 hm³
Volume stored
155 hm³
Vs month average
122% of normal
Coordinates
33.858°N, 117.183°W
Last updated
2026-10-14
Current fill
95.3%vs 7 days ago
+0.3%gaining
vs 1 year ago
+0.5%year-over-year
7-day trend
→stable
Drought context
Storage vs October average
122%of normal
95.3% full on 2026-10-14, against an average of 78.2% for October across 6 years of readings (+17.1 points).
Data source: CDEC — California Dept of Water Resources — daily reservoir storage volume. Capacity is the design (normal full-pool) capacity from the US National Inventory of Dams (NID); fill % = current volume ÷ design capacity. Last reading: 2026-10-14.
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
Satellite imagery: Esri, Maxar, Earthstar Geographics. Map: Esri, HERE, Garmin, © OpenStreetMap contributors. 33.858, -117.183 · Open in Google Maps
About PERRIS
As of October 14, 2026, PERRIS is filled to 95.3% of its total capacity, holding roughly 155 hm³ of water out of a maximum 162 hm³. At this level the reservoir is high.
Over the most recent week on record the fill level has held broadly steady (+0.3 pts), and it sits close to where it was a year earlier.
Across the readings we hold for PERRIS — 1823 data points between October 16, 2021 and October 14, 2026 — the level has ranged from a low of 56.3% (December 11, 2023) to a high of 97.2% (November 21, 2025). On average the reservoir is fullest around May and at its lowest around December.
It is operated by CDEC primarily for multiple purposes. It lies within the California basin at 33.858°N, 117.183°W.
Key facts
- Current fill level
- 95.3%
- Water stored
- 155 hm³
- Total capacity
- 162 hm³
- 7-day change
- ▲ 0.3 pts
- Year-on-year
- ▲ 0.5 pts
- Primary use
- Multipurpose
- River basin
- California
- Operator
- CDEC
- Coordinates
- 33.858°N, 117.183°W
- Last updated
- October 14, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 14 Oct 2026 | 95.3% | 155 |
| 13 Oct 2026 | 95.3% | 155 |
| 12 Oct 2026 | 95.3% | 155 |
| 11 Oct 2026 | 95.3% | 155 |
| 10 Oct 2026 | 95.0% | 154 |
| 9 Oct 2026 | 94.9% | 154 |
| 8 Oct 2026 | 95.0% | 154 |
| 7 Oct 2026 | 95.0% | 154 |
| 6 Oct 2026 | 95.0% | 154 |
| 5 Oct 2026 | 95.0% | 154 |
| 4 Oct 2026 | 95.0% | 154 |
| 3 Oct 2026 | 94.9% | 154 |