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Water Savings Calculator
Build your own impact simulation across three market tiers
(Usage based on California coastal and foothills rural properties)
423 systems · 1,246 sensors · 36 farms & ranches · 100 large rural · 287 rural homes · California coastal and foothills
Total water saved / yr
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Total $ saved / yr
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Energy avoided / yr
—
kWh
CO2 avoided / yr
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metric tons
Farms & Ranches
Beachhead · 45,000 properties
Saved per customer / yr
—
Customers
100of 45,000
Annual throughput1
Napa County WAA Guidelines (2015)
Vineyard irrigation at 0.5 AF/acre, frost protection at 0.25 AF/acre. A 20-acre vineyard = 15 AF/yr = 4.9M gal/yr.
5Mgal/yr
Water loss rate2
Napa County Water Conservation Workplan; Napa RCD
Drip systems well-maintained: 5-8%. Aged systems: 10-20%. With frost-protection line losses: up to 25%.
10% of normal use
5-25% typical. 100%+ = leak exceeds normal usage.
Cost of water8
City of Napa Rate Schedules; GSA Fee Study 2025
Self-supplied well: $0.003/gal. City of Napa: $0.007-$0.009/gal. Outside city: up to $0.015/gal. Default $0.008 blended.
$0.008/gal
$0 = own well. Pumping electricity (~$0.000625/gal at $0.25/kWh) always included.
Leak events / yr3
AWWA M36; Napa RCD irrigation evaluations
Failure modes: emitter aging, gopher/deer damage, frost-crack, UV degradation, clogging. Default 2.0 for mid-age vineyard.
2.0events
Leak flow rates4
AWWA M36; vineyard drip system hydraulics
Emitter failure: 0.5-2 gpm. Blown lateral: 5-15 gpm. Main supply header: 15-50 gpm.
Discoverable
10
gpm
Hidden
1.0
gpm
Discoverable fraction5
Napa RCD; Nagapurkar et al. (2025)
In vineyard drip systems, more leaks are hidden — buried laterals, drip lines under canopy.
60% disc / 40% hidden
Detection time (without meter.me)6
AWWA M36; Napa vineyard management
Discoverable: checked during irrigation sets. Hidden: can run an entire growing season undetected.
Discoverable
10
days
Hidden
120
days
True positive rate7
Mounce et al. 2010; Romano et al. 2014
70% conservative. 80% typical. 95% best-case with full coverage.
80%
Large Rural
Beachfront · 2,000,000 properties
Saved per customer / yr
—
Customers
500of 2,000,000
Annual throughput
100Kgal/yr
Water loss rate
5% of normal use
5-25% typical. 100%+ = leak exceeds normal usage.
Cost of water
$0.003/gal
$0 = own well. Pumping electricity (~$0.000625/gal at $0.25/kWh) always included.
Leak events / yr
0.5events
Leak flow rates
Discoverable
2
gpm
Hidden
0.1
gpm
Discoverable fraction
40% disc / 60% hidden
Detection time (without meter.me)
Discoverable
3
days
Hidden
30
days
True positive rate
70%
American West
TAM · 8,400,000 properties
Saved per customer / yr
—
Customers
1,000of 8,400,000
Annual throughput
100Kgal/yr
Water loss rate
5% of normal use
5-25% typical. 100%+ = leak exceeds normal usage.
Cost of water
$0.003/gal
$0 = own well. Pumping electricity (~$0.000625/gal at $0.25/kWh) always included.
Leak events / yr
0.5events
Leak flow rates
Discoverable
2
gpm
Hidden
0.1
gpm
Discoverable fraction
40% disc / 60% hidden
Detection time (without meter.me)
Discoverable
3
days
Hidden
30
days
True positive rate
70%
Farms & Ranches — estimation methods
Top-down
—
throughput × loss × TPR
Bottom-up
—
events × flow × days saved
—
Large Rural — estimation methods
Top-down
—
throughput × loss × TPR
Bottom-up
—
events × flow × days saved
—
American West — estimation methods
Top-down
—
throughput × loss × TPR
Bottom-up
—
events × flow × days saved
—
Equivalent to
—
[1] Napa County WAA Guidelines (2015). Vineyard irrigation at 0.5 AF/acre, frost protection at 0.25 AF/acre. Link
[2] Napa County Water Conservation Workplan (March 2024). Identifies 'fixing leaks' and 'distribution uniformity testing' as priority conservation actions. Link
[3] Napa RCD Irrigation Evaluations (Dec 2024). Documents pervasive emitter clogging, aging Netafim Woodpecker emitters (15-yr lifespan). Link
[4] AWWA M36 Manual: Water Audits and Loss Control Programs, 4th ed. (2016). Link
[5] Nagapurkar, P. et al. (2025). Smart Cities 8(4):122. DOI
[6] City of Napa Water Rate Schedules (2024-2028). Link
[7] Napa County GSA Rate & Fee Study (Dec 2025). Link
[8] EPA eGRID CAMX subregion. California: 0.20 kg CO2/kWh. Link
[9] Mounce, S.R. et al. (2010); Romano, M. et al. (2014). Leak detection true positive rates.
[10] Napa Valley Grapegrowers. Water & Irrigation resources. Link
[11] Lambert & Morrison (1996). Bursts and Background Estimates concepts for leakage management.
[12] Napa County Well Permit Standards (Jan 2024). Link
[13] Napa County Groundwater Sustainability Fee (adopted Dec 9, 2025). Link
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