SAN SIMEON is served by 6 water providers on file with the EPA.
Data current as of July 2026
🔍Straight from EPA
🧪Real Lab Results
📅Updated Quarterly
🏠Local Expertise
Results for SAN SIMEON, CA
6 water providers on file serving this city.
Quick answer: SAN SIMEON's water has no violations on file and no single reading stands out against its peers (6 other providers in this area). It serves roughly 9,012 people, and the full breakdown below reflects everything EPA and California have on record for it.
Nitrate
TTHM
Bromoform
Dibromochloromethane
Trichloroaceticacid
Aggressive Index
Temperature (CENTIGRADE)
Magnesium
Potassium
Sodium
Hardness, Total (ASCACO3)
Calcium
Alkalinity, Total
Alkalinity, Bicarbonate
TDS
Chloride
Sulfate
Fluoride
Turbidity
Radium-228
Gross Alpha Particle Activity
pH
Odor
Iron
Manganese
Barium
Arsenic
Selenium
Conductivity (at 25°C)
Color
Lead Summary
Copper, Free
Nitrate-Nitrite
Chromium, Hex
Combined Uranium
pH, Field
Boron, Total
Contaminants found
Metals
Naturally occurring or corrosion-related elements, e.g. lead, arsenic, copper
Iron
Detected: 770 UG/L (ppb)
1/20/2025
Mostly an aesthetic issue (metallic taste, staining) rather than a health concern at typical levels.
Manganese
Detected: 15 UG/L (ppb)
1/20/2025
Mainly a taste/staining concern at typical levels; long-term neurological research at high chronic exposure is ongoing.
Barium
Detected: 66 UG/L (ppb)
1/20/2025
Arsenic
Detected: 38 UG/L (ppb)
10/20/2025
Occurs naturally in some groundwater. Long-term exposure above the legal limit (10 ppb) has been linked to increased cancer risk and cardiovascular disease.
Selenium
Detected: 32 UG/L (ppb)
Found at 2 providers
Lead Summary
Detected: 0 mg/L (ppm)
Found at 2 providers
Copper, Free
Detected: 280 UG/L (ppb)
Found at 2 providers
Chromium, Hex
Detected: 0.053 UG/L (ppb)
3/27/2025
Combined Uranium
Detected: 11.7 PCI/L
10/7/2025
A naturally occurring radioactive metal. Long-term exposure above the legal limit is associated with kidney effects and increased cancer risk.
Disinfection Byproducts
Formed when chlorine used to disinfect water reacts with organic matter
TTHM
Detected: 10 UG/L (ppb)
8/26/2025
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: 5.8 UG/L (ppb)
8/26/2025
Dibromochloromethane
Detected: 3.6 UG/L (ppb)
8/26/2025
Inorganics
Common dissolved minerals and salts, e.g. nitrate, fluoride, chloride
Nitrate
Detected: 6.8 MG/L (ppm)
Found at 4 providers
Commonly from agricultural fertilizer runoff or septic systems. Above the legal limit, it's an immediate concern especially for infants.
Chloride
Detected: 150 MG/L (ppm)
Found at 2 providers
Sulfate
Detected: 199 MG/L (ppm)
Found at 2 providers
Fluoride
Detected: 0.79 MG/L (ppm)
Found at 2 providers
Often added deliberately for dental health; can also occur naturally.
Nitrate-Nitrite
Detected: 6.8 MG/L (ppm)
Found at 2 providers
Boron, Total
Detected: 400 UG/L (ppb)
10/7/2025
Minerals
Everyday minerals that mainly affect taste and water hardness
Magnesium
Detected: 59 MG/L (ppm)
Found at 2 providers
Potassium
Detected: 4 MG/L (ppm)
Found at 2 providers
Sodium
Detected: 260 MG/L (ppm)
Found at 2 providers
Calcium
Detected: 79 MG/L (ppm)
Found at 2 providers
Properties
General water characteristics like pH, hardness, and cloudiness (turbidity)
Hardness, Total (ASCACO3)
Detected: 440 MG/L (ppm)
Found at 2 providers
Gross Alpha Particle Activity
Detected: 16.9 PCI/L
Found at 3 providers
pH
Detected: 8.42 PH
1/20/2025
A measure of how acidic or basic the water is (7 is neutral). Affects taste and plumbing, not a direct health measure.
pH, Field
Detected: 7.47 PH
10/7/2025
Calculated Parameters
Values worked out mathematically from other test results, not measured directly
Alkalinity, Bicarbonate
Detected: 370 MG/L (ppm)
Found at 2 providers
Other
Additional substances tested that don't fit neatly into the categories above
Trichloroaceticacid
Detected: 3.4 UG/L (ppb)
8/26/2025
Aggressive Index
Detected: 12.3 AGGR
1/20/2025
Temperature (CENTIGRADE)
Detected: 21 C
1/20/2025
Alkalinity, Total
Detected: 370 MG/L (ppm)
Found at 2 providers
TDS
Detected: 890 MG/L (ppm)
Found at 2 providers
Turbidity
Detected: 1.7 NTU
1/20/2025
A measure of water cloudiness from suspended particles.
Radium-228
Detected: 1.09 PCI/L
7/10/2025
Odor
Detected: 12 TON
1/20/2025
Conductivity (at 25°C)
Detected: 1600 UMHO/CM
Found at 2 providers
Color
Detected: 7 UNITS
1/20/2025
Filtration considerations: General system types, not a specific product recommendation.