Early access · Rate data is actively expanding · Verify current rates with your utility
whatwatercosts.org

Have a more current rate document? Submit the URL and we'll update our data.

How we calculated this
Extracted by: codex/gpt-5.6-luna · 08/27/2026
Source:
Quality checks: 9/9 passed
  • ✓ Monotonic pricing
  • ✓ Price range plausible
  • ✓ Fixed charge range
  • ✓ No zero tier prices
  • ✓ Tier count (1–8)
  • ✓ Tier boundary scale
  • ✓ Residential customer class
  • ✓ Effective date parseable
  • ✓ Plausible for CA 
Fixed: $42.62/mo
Volume: 6,000 gal = 6000.00 gal
  0–3000 gal  ×  $0.0051/gal  =  $15.41
  3000–6000.00 gal  ×  $0.0071/gal  =  $21.32
Total: $42.62 + $36.73 = $79.35/mo
About our methodology ↗

Leaving whatwatercosts.org

You're about to open the source document we used to extract this utility's rate data.

Open ↗
← Back

Utility profile · CA

SONOMA STATE UNIVERSITY Water Rates

SONOMA STATE UNIVERSITY serves 10,986 people in Sonoma State University, CA. The monthly residential water bill at 6,000 gallons is $79.35, 49% above the national average of $53.11.

Updated Aug 2026

Beta. Data is actively being expanded. Results may vary. if something looks off.

How much does water cost provided by SONOMA STATE UNIVERSITY?

Standardized to a 6,000 gallon/month residential bill on a 5/8"–3/4" meter.

Monthly Rate

$79.35 / 6k gal
+49% vs natl avg

Volumetric Rate

$13.22 / 1k gal

How does SONOMA STATE UNIVERSITY's water cost compare to its regional neighbors?

Monthly cost (6k gal) vs up to 10 nearest utilities with published rates. Click to navigate.

WINDSOR, TOWN OF
$49.92
WINDSOR, TOWN OF
WINDSOR, CA · $49.92/mo · 15mi
PETALUMA, CITY OF
$71.27
PETALUMA, CITY OF
PETALUMA, CA · $71.27/mo · 7mi
NAPA, CITY OF
$71.78
NAPA, CITY OF
NAPA, CA · $71.78/mo · 20mi
VALLEY OF THE MOON WATER DISTRICT
$75.18
VALLEY OF THE MOON WATER DISTRICT
EL VERANO, CA · $75.18/mo · 10mi
SONOMA STATE UNIVERSITY
$79.35
SONOMA STATE UNIVERSITY
ROHNERT PARK · $79.35/mo
ROHNERT PARK, CITY OF
$79.35
ROHNERT PARK, CITY OF
ROHNERT PARK, CA · $79.35/mo · 1mi
SONOMA, CITY OF
$90.24
SONOMA, CITY OF
SONOMA, CA · $90.24/mo · 12mi
SANTA ROSA, CITY OF
$91.03
SANTA ROSA, CITY OF
SANTA ROSA, CA · $91.03/mo · 8mi
AMERICAN CANYON, CITY OF
$101.59
AMERICAN CANYON, CITY OF
AMERICAN CANYON, CA · $101.59/mo · 25mi
NORTH MARIN WATER DISTRICT
$122.05
NORTH MARIN WATER DISTRICT
NOVATO, CA · $122.05/mo · 16mi
HEALDSBURG, CITY OF
$134.56
HEALDSBURG, CITY OF
HEALDSBURG, CA · $134.56/mo · 22mi

Where does SONOMA STATE UNIVERSITY provide service?

Population served and the municipalities covered by this utility's service area.

Boundaries from the EPA Water System Service Areas dataset. Not all utilities have mapped boundaries.

Population Served

10,986

Municipalities served

Sonoma State University

Where does SONOMA STATE UNIVERSITY's water come from?

Supply and provider classification from EPA records.

Primary Source
Groundwater
Provider Type
State
PWSID
CA4910027

Named intake/well source and interconnections (who this utility buys from or sells to) aren't captured yet — tracked separately for a future update.

Is water affordable for SONOMA STATE UNIVERSITY's customers?

Annual bill as a share of median household income in the service area.

Water Burden

1.1% of income (annual)
of median area income · affordability threshold: 2%

We don't yet systematically track whether a utility offers income-based or sliding-scale pricing separate from its standard rates — tracked separately for a future update.

Where did this data come from?

This rate was extracted from SONOMA STATE UNIVERSITY's published tariff document by an AI research agent, then checked against a validation checklist before publishing. See the full methodology for how every utility on this site is sourced and scored.

Provenance

Extracted by: codex/gpt-5.6-luna · 08/27/2026
Confidence label: Model estimate

Quality checks: 9/9 passed

  • ✓ Monotonic pricing
  • ✓ Price range plausible
  • ✓ Fixed charge range
  • ✓ No zero tier prices
  • ✓ Tier count (1–8)
  • ✓ Tier boundary scale
  • ✓ Residential customer class
  • ✓ Effective date parseable
  • ✓ Plausible for CA