Texas Water Development Board

Water Loss Opportunity Calculator

The infrastructure and financial case for water loss reduction — dollar-denominated exposure, peer context, and prioritized remediation paths.

Healthy9.3% water loss

Water loss is at or below the 10% TWDB planning standard. This utility is operating in maintenance mode with the financial value of sustained performance shown below.

Panel 1 · The Value of Sustained Performance

Annual Loss (Maintained)
$2.16M
631.8M gallons · 9.3% of system input
10-Year Trajectory Loss
$25.02M
At 0.8%/yr loss change
10-Year If Performance Lapses
$30.64M
If performance slips to regional average
$5.62M is the 10-year value of maintaining your current performance — the gap between continued discipline and a slip back to average loss rates.
Real Loss (Physical)
~70%
$1.51M
442.3M gal · Leaks, main breaks, distribution losses
Apparent Loss (Meter / Data)
~30%
$648K
189.5M gal · Meter inaccuracy, data error, unauthorized use
Real / apparent split shown at AWWA M36 industry default (70/30). Production deploys the actual ratio from each utility's annual TCEQ water loss audit.

10-Year Cumulative Loss Projection

Two scenarios: your sustained trajectory vs. a slip back to the regional-average loss rate.

Panel 2 · Peer Context

Water Loss % vs. Anonymized Peers

No utility names shown

Peers matched by size band (47,916 connections) and customer class mix (79% SF / 15% MF / 6% ICI).

Peer Range
23 matched peers
Regional avg: 9.8%
You: 9.3%
Best: 5.8%Higher = worse

Panel 3 · Top 3 Recommendations to Sustain Leadership

1
leadership · Sustainment intervention

AWWA G500 / G480 Best-Practice Certification

Pursue formal AWWA water-loss management certification. Documents the utility's leadership position, supports rate-case arguments, and creates a sustained-performance baseline.

Annual Gallons Saved
12.6M
Capital Cost
$144K
$ / 1K gal saved
$11.38
Simple Payback
3.3 yrs
2
leadership · Sustainment intervention

Peer-Utility Mentoring Program

Share methodology and lessons learned with peer Texas utilities through TWDB regional convenings. Strengthens statewide outcomes and positions the utility as a regional resource.

Annual Gallons Saved
6.3M
Capital Cost
$96K
$ / 1K gal saved
$15.17
Simple Payback
4.4 yrs
3
operations · Sustainment intervention

Continuous DMA Optimization

Ongoing refinement of existing DMA boundaries, night-flow analysis, and economic level of leakage (ELL) modeling. Maintains low loss as system ages.

Annual Gallons Saved
37.9M
Capital Cost
$1.05M
$ / 1K gal saved
$27.81
Simple Payback
8.1 yrs
Recommendations are prioritized by Goldwater's standardized library, filtered for City of Pearland's tier and existing infrastructure (e.g., interventions already mastered are excluded). Production deploys the full Goldwater Recommendation Engine (Phase 3) with scenario modeling.
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Grounded in City of Pearland's actual numbers
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Claude answers using this utility's real Water Conservation Plan Annual Report metrics, conservation plan goals, and program activity — not generic advice.

Methodology

Performance tiers: Utilities are classified as Healthy (≤10% water loss, at or below the TWDB planning standard), Opportunity (10–15%, infrastructure case warranted), or Critical (>15%, significant exposure). Tier drives panel framing, projection scenarios, and which remediation interventions are surfaced.

Real / Apparent loss split: Demo uses the AWWA M36 industry default of 70% real / 30% apparent. Production deploys the actual ratio from each utility's annual TCEQ-required Water Loss Audit (TWDB-1721 form), and the ratio is editable by utility staff during the interview module if their own audit data indicates a different split.

10-year trajectory projection: Uses the compound annual growth rate of water loss GPCD across the utility's available history. Cost inflation applied at 3.5% per year (BLS water/sewer CPI 10-year average).

10-year “no intervention” / “slip” projection: For Opportunity and Critical tier utilities, models current loss volume held flat for 10 years (the “do nothing” worst case). For Healthy tier utilities, models a gradual ramp toward the regional-average loss rate (12%) over 10 years — representing the financial value of continued discipline.

Remediation recommendations: Selected from a tier-aware library. Opportunity / Critical utilities see foundational interventions (AMI deployment, DMA programs, acoustic leak detection, pressure management, main replacement). Healthy utilities see advanced sustainment interventions (continuous DMA optimization, AWWA G500/G480 certification, predictive failure modeling, peer-utility mentoring). Interventions already mastered are filtered out (e.g., AMI recommendations are suppressed for utilities at 95%+ existing AMI coverage). Production deploys the full Goldwater Recommendation Engine (Phase 3) with scenario modeling.

Peer comparison: Same peer-matching logic as Tool 1 — size band ±1 and single-family ratio within ±15 points. Peer water loss percentages shown anonymized: low, median, top quartile. No utility names disclosed.