# Gswc - South Shore — water loss as filed

DWR · PWS CA1700519 · filings 2024–2024
https://municorn.us/water-loss/ca/gswc-south-shore/

> **Cite as:** Municorn.us, "Gswc - South Shore — water loss as filed", Municorn water loss index, https://municorn.us/water-loss/ca/gswc-south-shore/ (source filings retrieved 2026-09-05).
> **Licence:** CC BY 4.0 — https://creativecommons.org/licenses/by/4.0/ — reuse and redistribution are permitted with attribution to Municorn.us and a link to this URL.
> **Caveat that must travel with these figures:** "Water loss" is at least three different quantities depending on the jurisdiction, and nothing here supports a comparison between states.

## Summary

Gswc - South Shore reported **40.0% non-revenue water** in FY2024, higher than 98% of the 545 California systems that filed that year.

**The water balance is not a check here.** DWR derives water losses from system input minus authorized consumption, so this decomposition holds by construction.

## Filed history

| Year | Non-revenue water % | System input (MG) |
|---|---|---|
| 2024 | 40.0% | 2.51 |

Balance closure is `inapplicable` on every filed year above, so the column that repeated it is
not shown. DWR derives water losses from system input minus authorized consumption, so this decomposition holds by construction. This is neither a pass nor a disclosure gap.

## How the cost figure is built

Apparent loss is water delivered and never billed, so it is valued at the retail rate: revenue, recoverable inside a
budget year without capital work. Real loss is valued at variable production cost, because eliminating a leak saves
treatment and pumping rather than retail price. Where the filed audit carries its own cost of losses — as
DWR's export does — those figures are used directly and no rate of ours enters the
calculation.

## Source

California DWR — urban retail water supplier water loss audits, filed under Water Code section 10608.34. Retrieved 2026-09-05. https://data.cnra.ca.gov/dataset/d6cdd89e-49b0-4b1f-86ee-8b7237e5f169/resource/058ac6ca-a8b4-4f28-b6c8-11e48309f3b4/download/ca-retailer-waterlossdata.csv

The FY2024 loss figure: (system input − billed authorized) ÷ system input × 100, from system input volume at `Sheet1!AN816`; billed authorized consumption at `Sheet1!AQ816` — in `data/archive/ca-dwr-water-loss/2026-09-05-f0dfea5a6026.csv` (sha256 f0dfea5a6026881d, retrieved 2026-09-05, https://data.cnra.ca.gov/dataset/d6cdd89e-49b0-4b1f-86ee-8b7237e5f169/resource/058ac6ca-a8b4-4f28-b6c8-11e48309f3b4/download/ca-retailer-waterlossdata.csv), read by `src/scrape/ca.ts` at eaf9ca89f144.

Volumes are normalized to million gallons on ingest; the export reports them in the unit each filing states.

Figures are as filed unless stated otherwise. If a number here is wrong it is wrong in the filing or wrong in
our reading of it, and both are worth knowing: ammar@municorn.us

_Municorn.us · https://municorn.us/water-loss/ca/gswc-south-shore/ · CC BY 4.0 https://creativecommons.org/licenses/by/4.0/ · source filings retrieved 2026-09-05_

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## What it charges

No bill is published for this system. This system did not file a complete residential rate structure — a fixed charge, at least one volumetric tier, and the unit those are quoted in.

## Compliance record

Violations on EPA's record as of 2026Q2: **46** (28 health-based).
Resolved: 26. Archived: 19. **Still open: 1.**

- Follow-up Or Routine LCR Tap M/R — addressed, from October 1, 2020

Counted as distinct violations rather than as rows: EPA's export carries one row per enforcement action taken
against a violation. A violation is a breach of a reporting, monitoring or contaminant-level rule as reported
to EPA; it is not a measurement of the water.

Source: US EPA, Safe Drinking Water Information System, via the ECHO national download, 2026Q2.