Serving roughly 31,018 people in Ventura County, California.
Data current as of July 2026
🔍Straight from EPA
🧪Real Lab Results
📅Updated Quarterly
🏠Local Expertise
Results for CITY OF SANTA PAULA
1 water provider directly on file, serving roughly 31,018 people in Ventura County, California.
Quick answer: CITY OF SANTA PAULA has no violations on file. One reading is worth knowing about: Manganese was measured at 380UG/L, among the highest of the 179 providers on file in this area. It's the most notable figure in this system's record among its 179 local peers.
Lead Summary
Lithium
TTHM
Bromoform
Dibromochloromethane
Dibromoaceticacid
Bromodichloromethane
Copper, Free
Manganese
Iron
Aggressive Index
Langelier Index (pH(s))
Magnesium
Potassium
Sodium
Hardness, Total (ASCACO3)
Calcium
Alkalinity, Total
Alkalinity, Bicarbonate
TDS
Chloride
Sulfate
Fluoride
Nitrate
Nitrate-Nitrite
Turbidity
Radium-228
Combined Uranium
Gross Alpha Particle Activity
pH, Field
Boron, Total
Chromium
Arsenic
Zinc
Conductivity (at 25°C)
Color
Utility CITY OF SANTA PAULAPopulation served 31,018Owner 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)
12/31/2025
Copper, Free
Detected: 70 UG/L (ppb)
8/20/2025
Manganese
Detected: 380 UG/L (ppb)
10/16/2025
Mainly a taste/staining concern at typical levels; long-term neurological research at high chronic exposure is ongoing.
Iron
Detected: 170 UG/L (ppb)
10/8/2025
Mostly an aesthetic issue (metallic taste, staining) rather than a health concern at typical levels.
Combined Uranium
Detected: 2.25 PCI/L
4/3/2025
A naturally occurring radioactive metal. Long-term exposure above the legal limit is associated with kidney effects and increased cancer risk.
Chromium
Detected: 13 UG/L (ppb)
4/3/2025
Occurs in two forms — trivalent (an essential nutrient in trace amounts) and hexavalent (linked to increased cancer risk).
Arsenic
Detected: 2 UG/L (ppb)
4/3/2025
Occurs naturally in some groundwater. Long-term exposure above the legal limit (10 ppb) has been linked to increased cancer risk and cardiovascular disease.
Zinc
Detected: 40 UG/L (ppb)
4/3/2025
Disinfection Byproducts
Formed when chlorine used to disinfect water reacts with organic matter
TTHM
Detected: 9 UG/L (ppb)
8/11/2025
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.
Bromoform
Detected: 6 UG/L (ppb)
8/11/2025
Dibromochloromethane
Detected: 3 UG/L (ppb)
8/11/2025
Bromodichloromethane
Detected: 1 UG/L (ppb)
8/11/2025
Inorganics
Common dissolved minerals and salts, e.g. nitrate, fluoride, chloride
Chloride
Detected: 29 MG/L (ppm)
4/3/2025
Sulfate
Detected: 282 MG/L (ppm)
4/3/2025
Fluoride
Detected: 0.6 MG/L (ppm)
4/3/2025
Often added deliberately for dental health; can also occur naturally.
Nitrate
Detected: 2.7 MG/L (ppm)
8/21/2025
Commonly from agricultural fertilizer runoff or septic systems. Above the legal limit, it's an immediate concern especially for infants.
Nitrate-Nitrite
Detected: 0.4 MG/L (ppm)
4/3/2025
Boron, Total
Detected: 400 UG/L (ppb)
4/3/2025
Minerals
Everyday minerals that mainly affect taste and water hardness
Magnesium
Detected: 26 MG/L (ppm)
4/3/2025
Potassium
Detected: 3 MG/L (ppm)
4/3/2025
Sodium
Detected: 75 MG/L (ppm)
4/3/2025
Calcium
Detected: 112 MG/L (ppm)
4/3/2025
Properties
General water characteristics like pH, hardness, and cloudiness (turbidity)
Langelier Index (pH(s))
Detected: 0.3 LANG
4/3/2025
Hardness, Total (ASCACO3)
Detected: 386 MG/L (ppm)
4/3/2025
Gross Alpha Particle Activity
Detected: 4.43 PCI/L
4/3/2025
pH, Field
Detected: 7.27 PH
4/3/2025
PFAS & Emerging Contaminants
Human-made "forever chemicals" and other substances not yet fully regulated
Lithium
Detected: 38 µg/L (ppb)
6/9/2025
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: 310 MG/L (ppm)
4/3/2025
Other
Additional substances tested that don't fit neatly into the categories above
Dibromoaceticacid
Detected: 4 UG/L (ppb)
8/11/2025
Aggressive Index
Detected: 12.1 AGGR
4/3/2025
Alkalinity, Total
Detected: 250 MG/L (ppm)
4/3/2025
TDS
Detected: 740 MG/L (ppm)
4/3/2025
Turbidity
Detected: 0.45 NTU
4/3/2025
A measure of water cloudiness from suspended particles.
Radium-228
Detected: 0.311 PCI/L
4/3/2025
Conductivity (at 25°C)
Detected: 1050 UMHO/CM
4/3/2025
Color
Detected: 7 UNITS
4/3/2025
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.