Cobb County Water System (cobb County - Marietta Water Authority)
What Cobb County Water System (cobb County - Marietta Water Authority) filed with EPD about the water it produced and the water it billed for, 2011–2016 — and what the filing does and does not let anyone verify.
- Non-revenue water, FY2016
- 9.8% Computed from filed system input and billed consumption.
- system input volume 21,378 sheet Sheet1, cell H55 · million gallons per year, declared in the header through 2020 and settled for 2021-2025 by EPD's own cost arithmetic and by continuity across the change
- billed authorized consumption 19,288 sheet Sheet1, cell I55 · billed metered plus billed unmetered
- Recoverable annually
- $1.2M Apparent loss is valued at this utility's own reported retail price of water. Real loss is NOT included — EPD 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 1,164,968 sheet Sheet1, cell Y55
- Balance check
- inapplicable EPD derives water losses from system input minus authorized consumption, so this decomposition holds by construction.
2026-09-06-1687d6bbdf46.csvSheet1 H55
Where this figure comes from
(system input − billed authorized) ÷ system input × 100
From data/archive/ga-epd-water-loss/2026-09-06-1687d6bbdf46.csv (SHA-256 1687d6bbdf466c07), retrieved 2026-09-06 from the published source.
2026-09-06-1687d6bbdf46.csvSheet1 Y55
Where this figure comes from
cost of apparent losses + cost of real losses, both as computed in the filed audit
From data/archive/ga-epd-water-loss/2026-09-06-1687d6bbdf46.csv (SHA-256 1687d6bbdf466c07), retrieved 2026-09-06 from the published source.
What the record shows
9.8% non-revenue water in FY2016, higher than 11% of the 225 Georgia systems that filed that year.
- The figure is roughly flat across the record.
Compliance record
3 violations on EPA's record for this system as of 2026Q2, of which 1 is health-based. 1 resolved, 2 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.
What is missing from this record, and why
EPD published 9 filings for Cobb County Water System (cobb County - Marietta Water Authority) that this page does not show: FY2017–FY2025. Cobb County Water System (cobb County - Marietta Water Authority) did file, and the filing is in EPD's published results.
It is absent here because two identifiers in one cell — a combined filing for two systems, filed as GA0670003/GA0670002, GA0670003 / GA0670002. Publishing it
under that identifier would attribute this utility's water balance to a different named system, and deciding which
system a contradicting filing belongs to is not a decision this pipeline is allowed to make. Read the gap as ours,
not as a utility that stopped reporting.
EPD 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 21,378 MG sheet Sheet1, cell H55 · million gallons per year, declared in the header through 2020 and settled for 2021-2025 by EPD's own cost arithmetic and by continuity across the change
- Billed authorized 19,288 MG sheet Sheet1, cell I55 · billed metered plus billed unmetered
- Unbilled authorized 14.9 MG sheet Sheet1, cell K55 · unbilled metered plus unbilled unmetered
- Apparent loss 228.4 MG sheet Sheet1, cell O55
- Real loss 1,847 MG sheet Sheet1, cell P55
From data/archive/ga-epd-water-loss/2026-09-06-1687d6bbdf46.csv (SHA-256 1687d6bbdf466c07), retrieved 2026-09-06 from the published source.
| Year | NRW | Input (MG) | Recoverable |
|---|---|---|---|
| 2016 | 9.8% | 21,378 | $1.2M |
| 2015 | 10.7% | 20,218 | $1.5M |
| 2014 | 15.8% | 20,821 | $1.0M |
| 2013 | 9.5% | 18,502 | $2.1M |
| 2012 | 12.4% | 21,196 | $1.4M |
| 2011 | 8.0% | 20,633 | $1.6M |
Comparable systems
In the same county.
| System | Basis for comparison | NRW |
|---|---|---|
| Marietta | COBB County | 4.4% FY2025 |
| Smyrna Water/ | COBB County | 2.4% FY2025 |
| Powder Springs | COBB County | 26.1% FY2018 |
| Austell | COBB County | 23.0% FY2025 |
| Dekalb County | over 50,000 connections | 30.8% FY2025 |
| Atlanta | over 50,000 connections | 36.5% FY2025 |
| Cherokee County Water And Sewerage | over 50,000 connections | 16.4% FY2025 |
| Clayton County | over 50,000 connections | 14.6% FY2025 |
Where is it going?
This page says how much — roughly $1.2M a year. It cannot say which accounts, which zones, or which meters. That 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 Cobb County Water System (cobb County - Marietta Water Authority)Sources 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 is wrong, it is either wrong in the filing or wrong in our reading of it — tell us which and we will correct the page and say what changed.
- Georgia EPD — validated water loss audit results, filed under the Water Stewardship Act of 2010. Retrieved 2026-09-06 from data/archive/ga-epd-water-loss/2026-09-06-1687d6bbdf46.csv. https://epd.georgia.gov/watershed-protection-branch/water-efficiency-and-water-loss-audits