# 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 |

## 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_

---

## 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.