LOMPOC is served by 3 water providers on file with the EPA.
Data current as of July 2026
🔍Straight from EPA
🧪Real Lab Results
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Results for LOMPOC, CA
3 water providers on file serving this city.
Quick answer: LOMPOC's water has no violations on file and no single reading stands out against its peers (3 other providers in this area). It serves roughly 40,473 people, and the full breakdown below reflects everything EPA and California have on record for it.
Lead Summary
Lithium
Aggressive Index
Langelier Index (pH(s))
Magnesium
Sodium
Hardness, Total (ASCACO3)
Calcium
Potassium
Alkalinity, Total
Alkalinity, Bicarbonate
TDS
Chloride
Sulfate
Fluoride
Turbidity
pH, Field
pH
Nitrate
Contaminants found
Metals
Naturally occurring or corrosion-related elements, e.g. lead, arsenic, copper
Lead Summary
Detected: 0 mg/L (ppm)
Found at 2 providers
Inorganics
Common dissolved minerals and salts, e.g. nitrate, fluoride, chloride
Chloride
Detected: 98 MG/L (ppm)
10/28/2025
Sulfate
Detected: 452 MG/L (ppm)
10/28/2025
Fluoride
Detected: 0.3 MG/L (ppm)
2/26/2025
Often added deliberately for dental health; can also occur naturally.
Nitrate
Detected: 3.4 MG/L (ppm)
Found at 2 providers
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: 73 MG/L (ppm)
10/8/2025
Sodium
Detected: 106 MG/L (ppm)
10/8/2025
Calcium
Detected: 151 MG/L (ppm)
10/8/2025
Potassium
Detected: 5 MG/L (ppm)
2/26/2025
Properties
General water characteristics like pH, hardness, and cloudiness (turbidity)
Langelier Index (pH(s))
Detected: 0.3 LANG
2/26/2025
Hardness, Total (ASCACO3)
Detected: 707 MG/L (ppm)
10/28/2025
pH, Field
Detected: 7.21 PH
2/26/2025
pH
Detected: 7.3 PH
8/15/2025
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: 37.5 µg/L (ppb)
10/12/2023
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: 460 MG/L (ppm)
10/8/2025
Other
Additional substances tested that don't fit neatly into the categories above
Aggressive Index
Detected: 12.2 AGGR
2/26/2025
Alkalinity, Total
Detected: 350 MG/L (ppm)
10/28/2025
TDS
Detected: 1188 MG/L (ppm)
10/28/2025
Turbidity
Detected: 20 NTU
2/26/2025
A measure of water cloudiness from suspended particles.
Filtration considerations: General system types, not a specific product recommendation.