VALLEY OF THE MOON WATER DISTRICT Water Quality Report
Serving roughly 23,107 people in Sonoma County, California.
Data current as of July 2026
🔍Straight from EPA
🧪Real Lab Results
📅Updated Quarterly
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Results for VALLEY OF THE MOON WATER DISTRICT
1 water provider directly on file, serving roughly 23,107 people in Sonoma County, California.
Quick answer: VALLEY OF THE MOON WATER DISTRICT has no violations on file and no single reading stands out against its peers (756 other providers in this area). It serves roughly 23,107 people, and the full breakdown below reflects everything EPA and California have on record for it.
Lead Summary
Copper Summary
Lithium
PFBS
PFOA
PFHXA
PFHXS
PFPEA
PFOS
Totalhaloaceticacids (HAA5)
TTHM
Chloroform
Bromodichloromethane
Dibromochloromethane
Dichloroaceticacid
Trichloroaceticacid
Nitrate
Gross Alpha Particle Activity
Chromium, Hex
Utility VALLEY OF THE MOON WATER DISTRICTPopulation served 23,107Owner Local government
No violations on file
Contaminants found
Metals
Naturally occurring or corrosion-related elements, e.g. lead, arsenic, copper
Lead Summary
Detected: 0 mg/L (ppm)
12/31/2023
Copper Summary
Detected: 1.8 mg/L (ppm)
12/31/1993
Chromium, Hex
Detected: 1.3 UG/L (ppb)
4/9/2025
Disinfection Byproducts
Formed when chlorine used to disinfect water reacts with organic matter
Totalhaloaceticacids (HAA5)
Detected: 6.7 UG/L (ppb)
4/1/2025
TTHM
Detected: 25 UG/L (ppb)
4/1/2025
A group of disinfection byproducts formed when chlorine reacts with organic matter. Long-term exposure above the legal limit has been linked to increased cancer risk in some studies.
Chloroform
Detected: 14 UG/L (ppb)
4/1/2025
One of the individual trihalomethane disinfection byproducts, formed when chlorine reacts with organic matter.
Bromodichloromethane
Detected: 7.5 UG/L (ppb)
4/1/2025
Dibromochloromethane
Detected: 4.1 UG/L (ppb)
4/1/2025
Inorganics
Common dissolved minerals and salts, e.g. nitrate, fluoride, chloride
Nitrate
Detected: 0.46 MG/L (ppm)
4/9/2025
Commonly from agricultural fertilizer runoff or septic systems. Above the legal limit, it's an immediate concern especially for infants.
Properties
General water characteristics like pH, hardness, and cloudiness (turbidity)
Gross Alpha Particle Activity
Detected: 4.63 PCI/L
1/22/2025
PFAS & Emerging Contaminants
Human-made "forever chemicals" and other substances not yet fully regulated
Lithium
Detected: 16 µg/L (ppb)
4/8/2025
Occurs naturally in some groundwater. Not currently federally regulated in drinking water.
PFBS
Detected: 0.0042 µg/L (ppb)
4/8/2025
PFOA
Detected: 0.0052 µg/L (ppb)
4/8/2025
One of two PFAS with an enforceable federal limit (4 ppt) since 2024.
PFHXA
Detected: 0.0036 µg/L (ppb)
4/8/2025
PFHXS
Detected: 0.0042 µg/L (ppb)
4/8/2025
PFPEA
Detected: 0.003 µg/L (ppb)
4/8/2025
PFOS
Detected: 0.0054 µg/L (ppb)
4/8/2025
One of two PFAS with an enforceable federal limit (4 ppt) since 2024.
Other
Additional substances tested that don't fit neatly into the categories above
Dichloroaceticacid
Detected: 4 UG/L (ppb)
4/1/2025
Trichloroaceticacid
Detected: 2.6 UG/L (ppb)
4/1/2025
Filtration considerations: See the table below for how whole-house carbon, under-sink reverse osmosis, and under-sink carbon systems compare against what's actually on file here. These are general system types, not a specific product recommendation.