Mamlu
Tehran
Capacity
258.3 hm³
Coordinates
35.583°N, 51.789°E
Operator
Iran Water Resources Management Company (IWRMC)
12.0% full
Current fill
12.0%vs 7 days ago
0.0%stable
vs 1 year ago
N/A7-day trend
→stable
Drought context
Rain over the last three months · 1 October 2026
Moderately dry
In the three months to 1 October 2026 the area around Mamlu had well below normal rain, a shortfall seen about one year in six. Rainfall compared with the long-run record for the same season at this point (Copernicus Global Drought Observatory, SPI-3 index −1.17). Rain, not storage. Iran drought figures →
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
Technical specifications
| Total capacity | 258.3 hm³ |
| Usable capacity | 258.3 hm³ |
| Primary use | water supply |
| Operator | Iran Water Resources Management Company (IWRMC) |
| Province | Tehran |
| Autonomous community | Tehran |
| River basin |
About Mamlu
As of September 19, 2026, Mamlu is filled to 12.0% of its total capacity, holding roughly 31 hm³ of water out of a maximum 258 hm³. At this level the reservoir is critically low.
Over the most recent week on record the fill level has held broadly steady (+0.0 pts).
Across the readings we hold for Mamlu — 1 data points between September 19, 2026 and September 19, 2026 — the level has ranged from a low of 12.0% (September 19, 2026) to a high of 12.0% (September 19, 2026).
It is operated by Iran Water Resources Management Company (IWRMC) primarily for water supply.
Key facts
- Current fill level
- 12.0%
- Water stored
- 31 hm³
- Total capacity
- 258 hm³
- 7-day change
- No change
- Primary use
- Water supply
- Operator
- Iran Water Resources Management Company (IWRMC)
- Coordinates
- 35.583°N, 51.789°E
- Last updated
- September 19, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 19 Sep 2026 | 12.0% | 31 |