CITY OF BUELLTON WATER DIVISION Water Quality Report
Serving roughly 5,161 people in Santa Barbara County, California.
Data current as of July 2026
🔍Straight from EPA
🧪Real Lab Results
📅Updated Quarterly
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Results for CITY OF BUELLTON WATER DIVISION
1 water provider directly on file, serving roughly 5,161 people in Santa Barbara County, California.
Quick answer: CITY OF BUELLTON WATER DIVISION has no violations on file. One reading is worth knowing about: Gross Alpha Particle Activity was measured at 10.1PCI/L, among the highest of the 255 providers on file in this area. It's the most notable figure in this system's record among its 255 local peers.
Lead Summary
Copper Summary
Lithium
Manganese
Aggressive Index
Langelier Index (pH(s))
Magnesium
Calcium
Sodium
Potassium
Alkalinity, Total
Alkalinity, Bicarbonate
Hardness, Total (ASCACO3)
Carbon, Total
TDS
Chloride
Sulfate
Fluoride
Nitrate-Nitrite
Nitrate
Combined Uranium
Gross Alpha Particle Activity
pH
Chromium, Hex
Arsenic
Copper, Free
Conductivity (at 25°C)
TTHM
Chloroform
Bromoform
Bromodichloromethane
Dibromochloromethane
Dibromoaceticacid
Utility CITY OF BUELLTON WATER DIVISIONPopulation served 5,161Owner 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: 1.7 mg/L (ppm)
12/31/2008
Manganese
Detected: 200 UG/L (ppb)
9/9/2025
Mainly a taste/staining concern at typical levels; long-term neurological research at high chronic exposure is ongoing.
Combined Uranium
Detected: 4.3 PCI/L
9/9/2025
A naturally occurring radioactive metal. Long-term exposure above the legal limit is associated with kidney effects and increased cancer risk.
Chromium, Hex
Detected: 0.37 UG/L (ppb)
9/23/2025
Arsenic
Detected: 2.8 UG/L (ppb)
9/9/2025
Occurs naturally in some groundwater. Long-term exposure above the legal limit (10 ppb) has been linked to increased cancer risk and cardiovascular disease.
Copper, Free
Detected: 6.4 UG/L (ppb)
9/9/2025
Disinfection Byproducts
Formed when chlorine used to disinfect water reacts with organic matter
TTHM
Detected: 6.1 UG/L (ppb)
1/15/2025
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: 0.78 UG/L (ppb)
1/15/2025
One of the individual trihalomethane disinfection byproducts, formed when chlorine reacts with organic matter.
Bromoform
Detected: 1.9 UG/L (ppb)
1/15/2025
Bromodichloromethane
Detected: 1.4 UG/L (ppb)
1/15/2025
Dibromochloromethane
Detected: 2 UG/L (ppb)
1/15/2025
Inorganics
Common dissolved minerals and salts, e.g. nitrate, fluoride, chloride
Chloride
Detected: 48 MG/L (ppm)
9/9/2025
Sulfate
Detected: 310 MG/L (ppm)
9/9/2025
Fluoride
Detected: 0.35 MG/L (ppm)
9/9/2025
Often added deliberately for dental health; can also occur naturally.
Nitrate-Nitrite
Detected: 0.51 MG/L (ppm)
9/9/2025
Nitrate
Detected: 0.51 MG/L (ppm)
9/9/2025
Commonly from agricultural fertilizer runoff or septic systems. Above the legal limit, it's an immediate concern especially for infants.
Minerals
Everyday minerals that mainly affect taste and water hardness
Magnesium
Detected: 63 MG/L (ppm)
9/9/2025
Calcium
Detected: 110 MG/L (ppm)
9/9/2025
Sodium
Detected: 65 MG/L (ppm)
9/9/2025
Potassium
Detected: 3.4 MG/L (ppm)
9/9/2025
Properties
General water characteristics like pH, hardness, and cloudiness (turbidity)
Langelier Index (pH(s))
Detected: 0.57 LANG
9/9/2025
Hardness, Total (ASCACO3)
Detected: 540 MG/L (ppm)
9/9/2025
Gross Alpha Particle Activity
Detected: 10.1 PCI/L
9/9/2025
pH
Detected: 7.8 PH
9/9/2025
A measure of how acidic or basic the water is (7 is neutral). Affects taste and plumbing, not a direct health measure.
PFAS & Emerging Contaminants
Human-made "forever chemicals" and other substances not yet fully regulated
Lithium
Detected: 24.3 µg/L (ppb)
8/27/2025
Occurs naturally in some groundwater. Not currently federally regulated in drinking water.
Calculated Parameters
Values worked out mathematically from other test results, not measured directly
Alkalinity, Bicarbonate
Detected: 270 MG/L (ppm)
9/9/2025
Other
Additional substances tested that don't fit neatly into the categories above
Aggressive Index
Detected: 12.7 AGGR
9/9/2025
Alkalinity, Total
Detected: 270 MG/L (ppm)
9/9/2025
Carbon, Total
Detected: 1.6 MG/L (ppm)
9/9/2025
TDS
Detected: 940 MG/L (ppm)
9/9/2025
Conductivity (at 25°C)
Detected: 1100 UMHO/CM
9/9/2025
Dibromoaceticacid
Detected: 1.8 UG/L (ppb)
1/15/2025
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.