Serving roughly 38,377 people in Monterey County, California.
Data current as of July 2026
🔍Straight from EPA
🧪Real Lab Results
📅Updated Quarterly
🏠Local Expertise
Results for MARINA COAST WATER DISTRICT
1 water provider directly on file, serving roughly 38,377 people in Monterey County, California.
Quick answer: MARINA COAST WATER DISTRICT has no violations on file and no single reading stands out against its peers (672 other providers in this area). It serves roughly 38,377 people, and the full breakdown below reflects everything EPA and California have on record for it.
Lead Summary
Lithium
TTHM
Bromoform
Dibromochloromethane
Bromodichloromethane
Dibromoaceticacid
Copper, Free
Aggressive Index
Langelier Index (pH(s))
Magnesium
Potassium
Sodium
Calcium
Alkalinity, Total
Alkalinity, Bicarbonate
Hardness, Total (ASCACO3)
TDS
Chloride
Sulfate
Fluoride
Nitrate-Nitrite
Nitrate
Combined Uranium
Gross Alpha Particle Activity
Gross Beta Particle Activity
pH
Chromium, Hex
Trichloroethylene
Barium
Arsenic
Selenium
Conductivity (at 25°C)
Utility MARINA COAST WATER DISTRICTPopulation served 38,377Owner 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: 120 UG/L (ppb)
8/20/2025
Combined Uranium
Detected: 5.7 PCI/L
7/8/2025
A naturally occurring radioactive metal. Long-term exposure above the legal limit is associated with kidney effects and increased cancer risk.
Chromium, Hex
Detected: 4.9 UG/L (ppb)
1/2/2025
Barium
Detected: 63 UG/L (ppb)
7/9/2025
Arsenic
Detected: 5.6 UG/L (ppb)
7/9/2025
Occurs naturally in some groundwater. Long-term exposure above the legal limit (10 ppb) has been linked to increased cancer risk and cardiovascular disease.
Selenium
Detected: 3.5 UG/L (ppb)
7/9/2025
Disinfection Byproducts
Formed when chlorine used to disinfect water reacts with organic matter
TTHM
Detected: 5 UG/L (ppb)
10/9/2025
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: 2.6 UG/L (ppb)
10/9/2025
Dibromochloromethane
Detected: 1.8 UG/L (ppb)
10/9/2025
Bromodichloromethane
Detected: 0.61 UG/L (ppb)
10/9/2025
Inorganics
Common dissolved minerals and salts, e.g. nitrate, fluoride, chloride
Chloride
Detected: 59 MG/L (ppm)
7/9/2025
Sulfate
Detected: 53 MG/L (ppm)
7/9/2025
Fluoride
Detected: 0.14 MG/L (ppm)
7/9/2025
Often added deliberately for dental health; can also occur naturally.
Nitrate-Nitrite
Detected: 3.9 MG/L (ppm)
10/2/2025
Nitrate
Detected: 3.9 MG/L (ppm)
10/2/2025
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: 6.2 MG/L (ppm)
7/9/2025
Potassium
Detected: 2.1 MG/L (ppm)
7/9/2025
Sodium
Detected: 70 MG/L (ppm)
7/9/2025
Calcium
Detected: 23 MG/L (ppm)
7/9/2025
Properties
General water characteristics like pH, hardness, and cloudiness (turbidity)
Langelier Index (pH(s))
Detected: -0.14 LANG
7/9/2025
Hardness, Total (ASCACO3)
Detected: 84 MG/L (ppm)
7/9/2025
Gross Alpha Particle Activity
Detected: 7.43 PCI/L
7/8/2025
pH
Detected: 8.1 PH
7/9/2025
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: 23.7 µg/L (ppb)
8/9/2023
Occurs naturally in some groundwater. Not currently federally regulated in drinking water.
VOCs (Volatile Organic Compounds)
Industrial solvents and fuel-related chemicals that evaporate easily
Trichloroethylene
Detected: 1.5 UG/L (ppb)
10/2/2025
Calculated Parameters
Values worked out mathematically from other test results, not measured directly
Alkalinity, Bicarbonate
Detected: 110 MG/L (ppm)
7/9/2025
Other
Additional substances tested that don't fit neatly into the categories above
Dibromoaceticacid
Detected: 1.2 UG/L (ppb)
10/9/2025
Aggressive Index
Detected: 11.9 AGGR
7/9/2025
Alkalinity, Total
Detected: 110 MG/L (ppm)
7/9/2025
TDS
Detected: 340 MG/L (ppm)
7/9/2025
Gross Beta Particle Activity
Detected: 6.92 PCI/L
9/23/2025
Conductivity (at 25°C)
Detected: 500 UMHO/CM
7/9/2025
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.