Serving roughly 6,175 people in Mendocino County, California.
Data current as of July 2026
🔍Straight from EPA
🧪Real Lab Results
📅Updated Quarterly
🏠Local Expertise
Results for WILLITS, CITY OF
1 water provider directly on file, serving roughly 6,175 people in Mendocino County, California.
Quick answer: WILLITS, CITY OF has no violations on file and no single reading stands out against its peers (265 other providers in this area). It serves roughly 6,175 people, and the full breakdown below reflects everything EPA and California have on record for it.
Lead Summary
Totalhaloaceticacids (HAA5)
TTHM
Chloroform
Bromodichloromethane
Dibromochloromethane
Dichloroaceticacid
Trichloroaceticacid
Dibromoaceticacid
Carbon, Total
Odor
Color
Manganese
Alkalinity, Total
Alkalinity, Bicarbonate
Iron
Aluminum
Copper, Free
Utility WILLITS, CITY OFPopulation served 6,175Owner Local government
Naturally occurring or corrosion-related elements, e.g. lead, arsenic, copper
Lead Summary
Detected: 0 mg/L (ppm)
12/31/2022
Manganese
Detected: 250 UG/L (ppb)
10/15/2025
Mainly a taste/staining concern at typical levels; long-term neurological research at high chronic exposure is ongoing.
Iron
Detected: 190 UG/L (ppb)
10/15/2025
Mostly an aesthetic issue (metallic taste, staining) rather than a health concern at typical levels.
Aluminum
Detected: 350 UG/L (ppb)
4/16/2025
Copper, Free
Detected: 50 UG/L (ppb)
9/24/2025
Disinfection Byproducts
Formed when chlorine used to disinfect water reacts with organic matter
Totalhaloaceticacids (HAA5)
Detected: 17.8 UG/L (ppb)
7/17/2025
TTHM
Detected: 25.69 UG/L (ppb)
7/17/2025
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: 21.82 UG/L (ppb)
7/17/2025
One of the individual trihalomethane disinfection byproducts, formed when chlorine reacts with organic matter.
Bromodichloromethane
Detected: 3.87 UG/L (ppb)
7/17/2025
Dibromochloromethane
Detected: 1.16 UG/L (ppb)
4/11/2025
Calculated Parameters
Values worked out mathematically from other test results, not measured directly
Alkalinity, Bicarbonate
Detected: 93 MG/L (ppm)
9/17/2025
Other
Additional substances tested that don't fit neatly into the categories above
Dichloroaceticacid
Detected: 11.3 UG/L (ppb)
7/17/2025
Trichloroaceticacid
Detected: 5.5 UG/L (ppb)
7/17/2025
Dibromoaceticacid
Detected: 1 UG/L (ppb)
7/17/2025
Carbon, Total
Detected: 1.49 MG/L (ppm)
9/17/2025
Odor
Detected: 14 TON
9/10/2025
Color
Detected: 9 UNITS
9/10/2025
Alkalinity, Total
Detected: 93 MG/L (ppm)
9/17/2025
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.