Calaveras County Water District
What Calaveras County Water District filed with DWR about the water it produced and the water it billed for, 2020–2025 — and what the filing does and does not let anyone verify.
- Non-revenue water, FY2025
- 23.3% Computed from filed system input and billed consumption.
- system input volume 49.6 sheet Sheet1, cell AN197 · converted to million gallons from acre-feet
- billed authorized consumption 38 sheet Sheet1, cell AQ197 · billed metered plus billed unmetered, converted to million gallons from acre-feet
- Annual value of the filed loss
- $1,780 Apparent loss is valued at this utility's own reported retail price of water. Real loss is NOT included — DWR publishes a variable production cost whose unit it does not declare, so no dollar figure is put on the leaked water. The real recoverable total is higher than this by an amount this filing does not let anyone state.
- cost of apparent losses, as filed 1,784 sheet Sheet1, cell DH197
2026-09-05-f0dfea5a6026.csvSheet1 AN197agency source
Where this figure comes from
(system input − billed authorized) ÷ system input × 100
Read from data/archive/ca-dwr-water-loss/2026-09-05-f0dfea5a6026.csv (SHA-256 f0dfea5a6026881d), our archived copy of the file as it stood on 2026-09-05. That path is committed to the repository and is not served here. The agency publishes its own current copy at https://data.cnra.ca.gov/dataset/d6cdd89e-49b0-4b1f-86ee-8b7237e5f169/resource/058ac6ca-a8b4-4f28-b6c8-11e48309f3b4/download/ca-retailer-waterlossdata.csv, which may since have been revised.
2026-09-05-f0dfea5a6026.csvSheet1 DH197agency source
Where this figure comes from
cost of apparent losses + cost of real losses, both as computed in the filed audit
Read from data/archive/ca-dwr-water-loss/2026-09-05-f0dfea5a6026.csv (SHA-256 f0dfea5a6026881d), our archived copy of the file as it stood on 2026-09-05. That path is committed to the repository and is not served here. The agency publishes its own current copy at https://data.cnra.ca.gov/dataset/d6cdd89e-49b0-4b1f-86ee-8b7237e5f169/resource/058ac6ca-a8b4-4f28-b6c8-11e48309f3b4/download/ca-retailer-waterlossdata.csv, which may since have been revised.
What the record shows
23.3% non-revenue water in FY2025, higher than 93% of the 141 California systems that filed that year.
- The figure is improving across the record.
It does not establish what moved. A meter replacement program, a main break, a change of billing system, a corrected prior-year filing and an ordinary reporting error all produce a series that looks like this, and a filed water loss audit does not say which happened. What the flag does say is that the years disagree with each other by more than most of the state's do, so a single year of this series is a weak basis for a decision without the records behind it.
What it charges
No bill is published for this system. This system does not bill monthly, and a bill is per billing period — a bi-monthly fixed charge is not half a monthly one, and nothing filed says how its tiers apply to a month.
It did answer the Board's customer-charge questions for reporting year 2025; what is missing is what a comparable figure needs.
Source: California State Water Resources Control Board, electronic Annual Report 2025, section 8a, filed under Health and Safety Code section 116530. How every California bill on this site compares.
Compliance record
11 violations on EPA's record for this system as of 2026Q2, of which 2 are health-based. 10 resolved, 1 archived, and 0 still open.
Nothing on the record is open as of 2026Q2.
Counted as distinct violations, not as rows: EPA's export carries one row per enforcement action taken against a violation, so a row count would multiply this system's record several times over. A violation here is a breach of a reporting, monitoring or contaminant-level rule as reported to EPA — it is not a measurement of the water, and this site has none.
Source: US EPA, Safe Drinking Water Information System, via the ECHO national download, 2026Q2. How we hold it.
Who filed this audit
Calaveras County Water District filed 6 separate audits for FY2025, one for each public water system it operates, and this page is one of them. California keys its water loss export on the filing organization and not on the system, so a count of California audits is not a count of independent utilities. Calaveras County Water District made one set of decisions and filed it 6 times. Read any statewide figure with that in mind, including the ones on this site.
Every figure on this page is read from DWR's published export as this site holds it: a 184-column extract of DWR's 190-column file. Six columns naming individuals, including the contact and the third-party validator, are removed before the bytes are committed, so the click path behind each figure lands on the extract and not on DWR's original. The column letters differ from DWR's for that reason.
DWR derives water losses from system input minus authorized consumption, so these parts sum to the whole on every filing. What a filing can get wrong is which of these numbers were measured.
Where these volumes come from
- System input 49.6 MG sheet Sheet1, cell AN197 · converted to million gallons from acre-feet
- Billed authorized 38 MG sheet Sheet1, cell AQ197 · billed metered plus billed unmetered, converted to million gallons from acre-feet
- Unbilled authorized 0.22 MG sheet Sheet1, cell AW197 · unbilled metered plus unbilled unmetered, converted to million gallons from acre-feet
- Apparent loss 0.58 MG sheet Sheet1, cell CC197 · converted to million gallons from acre-feet
- Real loss 10.8 MG sheet Sheet1, cell CE197 · converted to million gallons from acre-feet
From data/archive/ca-dwr-water-loss/2026-09-05-f0dfea5a6026.csv (SHA-256 f0dfea5a6026881d), retrieved 2026-09-05 from the published source.
| Year | NRW | Input (MG) | Recoverable |
|---|---|---|---|
| 2025 | 23.3% | 49.6 | $1,780 |
| 2024 | 21.8% | 45.3 | $490 |
| 2023 | 33.9% | 53.4 | $870 |
| 2022 | 46.6% | 70.9 | $1,650 |
| 2021 | 39.3% | 58.5 | $1,480 |
| 2020 | 33.2% | 54.7 | $1,490 |
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.
Comparable systems
The same size band — under 1,000 connections.
| System | Basis for comparison | NRW |
|---|---|---|
| Tahoe City Public Utility District | under 1,000 connections | 19.4% FY2024 |
| Cws Krv Lower Bodfish | under 1,000 connections | 38.3% FY2024 |
| Gswc - Edna Road | under 1,000 connections | 12.9% FY2024 |
| California - American Water Company - Ventura District - Las Posas Estates | under 1,000 connections | 3.8% FY2024 |
| Placer County Water Agency Weimar | under 1,000 connections | 27.1% FY2024 |
| California - American Water Company - Rio Plaza (el Rio) | under 1,000 connections | 9.2% FY2024 |
| Cws Sln Las Lomas | under 1,000 connections | 13.7% FY2024 |
| California - American Water Company - Sacramento District - Isleton | under 1,000 connections | 41.9% FY2024 |
Where is it going?
This page values the loss at roughly $1,780 a year. It cannot say which accounts, which zones, or which meters, and it cannot say how much of that value is collectable. Answering either takes your billing history, your meter reads, and your production data reconciled against each other.
Our Water Loss Recovery Snapshot is three weeks, one flat fee, and the deliverable is a ranked list of specific accounts and zones with dollars and a confidence on each.
See what the Snapshot delivers Email us about Calaveras County Water DistrictSources and corrections. Every figure above is either filed by the utility or computed from filed figures, and each one says which. If a number here looks wrong, tell us: the error may be in the filing, in our reading of it, or in something the export does not show. Send a correction. We will check it against the source, correct the page where it is wrong, and say what changed.
- California DWR — urban retail water supplier water loss audits, filed under Water Code section 10608.34. Retrieved 2026-09-05 from data/archive/ca-dwr-water-loss/2026-09-05-f0dfea5a6026.csv. https://data.cnra.ca.gov/dataset/d6cdd89e-49b0-4b1f-86ee-8b7237e5f169/resource/058ac6ca-a8b4-4f28-b6c8-11e48309f3b4/download/ca-retailer-waterlossdata.csv