Rainwater Harvesting in Nevada
Nevada (NV) receives an average of 9.5 inches of rainfall per year, placing it in the very low-rainfall category among US states. The wettest month is typically Jan, and the driest is Jun. Rainwater harvesting is fully legal in Nevada. A standard 1,500-square-foot asphalt shingle roof can collect approximately 5,683 gal per year, saving an estimated $39.78 annually at the state's average municipal water rate of 0.7 cents per gallon.
Monthly Rainfall in Nevada
Understanding Nevada's monthly rainfall distribution is essential for sizing your storage tank correctly. The table below shows average monthly rainfall and the resulting harvest from a 1,500-square-foot roof. Nevada's 9.5 inches of annual rainfall is relatively low, making every drop valuable. Even in arid climates, a properly designed harvesting system provides meaningful water for drought-tolerant landscaping, container gardens, and supplemental outdoor use.
| Month | Rainfall (in) | Harvest (1,500 sq ft) |
|---|---|---|
| Jan | 1.0" | 748 gal |
| Feb | 1.0" | 748 gal |
| Mar | 0.8" | 598 gal |
| Apr | 0.5" | 374 gal |
| May | 0.5" | 374 gal |
| Jun | 0.3" | 224 gal |
| Jul | 0.4" | 299 gal |
| Aug | 0.5" | 374 gal |
| Sep | 0.5" | 374 gal |
| Oct | 0.6" | 449 gal |
| Nov | 0.7" | 523 gal |
| Dec | 0.8" | 598 gal |
| Total | 9.5" | 5,683 gal |
Harvest by Roof Size in Nevada
Your actual harvest depends on how much roof area you connect to your collection system. Not every square foot of your roof needs to drain into your tank — many homeowners start by connecting just one or two downspouts covering a portion of their roof. The table below shows what different collection areas yield annually in Nevada using an asphalt shingle roof at 80% efficiency.
| Roof Area | Annual Harvest | Rec. Tank Size | Annual Savings |
|---|---|---|---|
| 1,000 sq ft | 3,787 gal | 500 gal | $26.51 |
| 1,500 sq ft | 5,683 gal | 1,000 gal | $39.78 |
| 2,000 sq ft | 7,574 gal | 1,000 gal | $53.02 |
| 2,500 sq ft | 9,470 gal | 1,500 gal | $66.29 |
Upgrading to a metal roof (95% efficiency) boosts collection by about 19% compared to asphalt shingle. For example, a 1,500-square-foot metal roof in Nevada captures approximately 6,747 gal per year when used for garden irrigation and toilet flushing for a household of two.
Rainwater Harvesting Laws in Nevada
Nevada legalized rainwater harvesting in 2017. Collection is allowed for non-potable uses. The Southern Nevada Water Authority offers rebates for rain barrel installations.
Regulation Summary for Nevada
- Legal Status: Legal — no restrictions
- Max Collection: No limit
- Permit Required: No — for standard residential systems
- Municipal Water Rate: 0.7 cents per gallon (state average)
Popular Uses for Harvested Rainwater in Nevada
Nevada homeowners use harvested rainwater for a variety of purposes. The most common applications are garden irrigation, lawn watering, and toilet flushing. Each use has different water requirements and may require different levels of filtration. Explore detailed guides for the most popular uses in Nevada:
How Nevada Compares to Similar States
The table below compares Nevada with five states that have similar annual rainfall patterns. All calculations use a standard 1,500-square-foot asphalt shingle roof collecting water for garden irrigation.
| State | Annual Rainfall | Legal Status | Annual Harvest | Water Cost | Annual Savings |
|---|---|---|---|---|---|
| Nevada | 9.5" | Legal | 5,683 gal | 0.7 c/gal | $39.78 |
| Utah | 12.2" | restricted | 9,421 gal | 0.4 c/gal | $37.68 |
| Wyoming | 12.9" | Legal | 8,748 gal | 0.5 c/gal | $43.74 |
| Arizona | 13.6" | Legal | 8,373 gal | 0.6 c/gal | $50.24 |
| New Mexico | 14.6" | Legal | 9,047 gal | 0.7 c/gal | $63.33 |
| Montana | 15.3" | Legal | 10,692 gal | 0.5 c/gal | $53.46 |
Tips for Rainwater Harvesting in Nevada
In a low-rainfall state like Nevada (9.5 inches per year), every gallon of harvested rainwater is especially valuable. Focus on drought-tolerant landscaping (xeriscaping) that requires minimal supplemental watering, and use harvested rainwater to support container gardens, potted plants, and select high-value plantings. A metal roof is strongly recommended to maximize collection from each rain event. Size your tank generously relative to your roof area — in Nevada, rain events are often separated by weeks of dry weather, so you need enough storage to capture and hold the occasional heavy rain. Even modest systems provide meaningful water savings in Nevada due to the higher-than-average water costs that accompany dry climates.
Calculate Your Specific Harvest in Nevada
The estimates above use standardized assumptions. Use our Rainwater Harvesting Calculator to enter your exact roof area, material, household size, and intended uses for a customized analysis tailored to your property in Nevada. You can also browse all states to compare potential across the country, or explore tank sizes and water uses for detailed information on system components and water budgeting.