Serving roughly 56,253 people in Monterey County, California.
Data current as of July 2026
🔍Straight from EPA
🧪Real Lab Results
📅Updated Quarterly
🏠Local Expertise
Results for ALCO WATER SERVICE
1 water provider directly on file, serving roughly 56,253 people in Monterey County, California.
Quick answer: ALCO WATER SERVICE has no violations on file. One reading is worth knowing about: Nitrate-Nitrite was measured at 9.5MG/L, among the highest of the 672 providers on file in this area. It's the most notable figure in this system's record among its 672 local peers.
Lead Summary
Lithium
Lead
TTHM
Bromoform
Copper, Free
Aggressive Index
Langelier Index (pH(s))
Langelier Index (Source Temp.)
Magnesium
Potassium
Sodium
Hardness, Total (ASCACO3)
Calcium
Bromide
Alkalinity, Total
Alkalinity, Bicarbonate
TDS
Sulfate
Chloride
Fluoride
Nitrate-Nitrite
Nitrate
Turbidity
Radium-228
Combined Uranium
Combined Radium (-226 & -228)
Gross Alpha Particle Activity
pH
Chromium, Hex
Perchlorate
Chromium
Barium
Arsenic
Selenium
Antimony, Total
Conductivity (at 25°C)
Utility ALCO WATER SERVICEPopulation served 56,253Owner Private
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
Lead
Detected: 1.2 UG/L (ppb)
7/2/2025
A metal that can leach from old pipes, solder, and fixtures. Current medical guidance holds there is no truly safe level of lead exposure, especially for children and pregnant women.
Copper, Free
Detected: 13 UG/L (ppb)
8/5/2025
Combined Uranium
Detected: 1.8 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: 4.9 UG/L (ppb)
3/27/2025
Chromium
Detected: 3 UG/L (ppb)
3/3/2025
Occurs in two forms — trivalent (an essential nutrient in trace amounts) and hexavalent (linked to increased cancer risk).
Barium
Detected: 67 UG/L (ppb)
3/3/2025
Arsenic
Detected: 4.4 UG/L (ppb)
3/3/2025
Occurs naturally in some groundwater. Long-term exposure above the legal limit (10 ppb) has been linked to increased cancer risk and cardiovascular disease.
Selenium
Detected: 3.7 UG/L (ppb)
3/3/2025
Antimony, Total
Detected: 1 UG/L (ppb)
3/3/2025
Disinfection Byproducts
Formed when chlorine used to disinfect water reacts with organic matter
TTHM
Detected: 0.7 UG/L (ppb)
9/9/2025
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: 0.7 UG/L (ppb)
9/9/2025
Inorganics
Common dissolved minerals and salts, e.g. nitrate, fluoride, chloride
Sulfate
Detected: 46 MG/L (ppm)
3/3/2025
Chloride
Detected: 119 MG/L (ppm)
3/3/2025
Fluoride
Detected: 0.27 MG/L (ppm)
3/3/2025
Often added deliberately for dental health; can also occur naturally.
Nitrate-Nitrite
Detected: 9.5 MG/L (ppm)
3/3/2025
Nitrate
Detected: 3 MG/L (ppm)
9/16/2025
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: 23.5 MG/L (ppm)
3/3/2025
Potassium
Detected: 1.9 MG/L (ppm)
3/3/2025
Sodium
Detected: 58 MG/L (ppm)
3/3/2025
Calcium
Detected: 63 MG/L (ppm)
3/3/2025
Properties
General water characteristics like pH, hardness, and cloudiness (turbidity)
Langelier Index (pH(s))
Detected: 0.21 LANG
3/3/2025
Hardness, Total (ASCACO3)
Detected: 254 MG/L (ppm)
3/3/2025
Gross Alpha Particle Activity
Detected: 3.28 PCI/L
9/9/2025
pH
Detected: 7.2 PH
3/3/2025
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: 20.1 µg/L (ppb)
9/12/2023
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
Bromide
Detected: 0.37 MG/L (ppm)
3/3/2025
Calculated Parameters
Values worked out mathematically from other test results, not measured directly
Alkalinity, Bicarbonate
Detected: 167 MG/L (ppm)
3/3/2025
Other
Additional substances tested that don't fit neatly into the categories above
Aggressive Index
Detected: 11.5 AGGR
3/3/2025
Langelier Index (Source Temp.)
Detected: -0.62 LANG
3/3/2025
Alkalinity, Total
Detected: 137 MG/L (ppm)
3/3/2025
TDS
Detected: 474 MG/L (ppm)
3/3/2025
Turbidity
Detected: 0.1 NTU
3/3/2025
A measure of water cloudiness from suspended particles.
Radium-228
Detected: 0.152 PCI/L
3/3/2025
Combined Radium (-226 & -228)
Detected: 0.479 PCI/L
3/3/2025
A naturally occurring radioactive element found in some groundwater.
Perchlorate
Detected: 1.7 UG/L (ppb)
6/10/2025
Can occur naturally or from industrial/military sources; may interfere with thyroid function at elevated levels.
Conductivity (at 25°C)
Detected: 814 UMHO/CM
3/3/2025
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.