Serving roughly 6,150 people in Merced County, California.
Data current as of July 2026
🔍Straight from EPA
🧪Real Lab Results
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Results for CAL TRANS ERRECA REST AREA
1 water provider directly on file, serving roughly 6,150 people in Merced County, California.
Quick answer: CAL TRANS ERRECA REST AREA has no violations on file and no single reading stands out against its peers (237 other providers in this area). It serves roughly 6,150 people, and the full breakdown below reflects everything EPA and California have on record for it.
Magnesium
Calcium
Sodium
Alkalinity, Total
Alkalinity, Bicarbonate
Hardness, Total (ASCACO3)
TDS
Chloride
Sulfate
pH
Iron
Barium
Arsenic
Copper, Free
Conductivity (at 25°C)
Utility CAL TRANS ERRECA REST AREAPopulation served 6,150Owner State or Territorial Government
No violations on file
Contaminants found
Metals
Naturally occurring or corrosion-related elements, e.g. lead, arsenic, copper
Iron
Detected: 77 UG/L (ppb)
7/14/2025
Mostly an aesthetic issue (metallic taste, staining) rather than a health concern at typical levels.
Barium
Detected: 23 UG/L (ppb)
7/14/2025
Arsenic
Detected: 2.5 UG/L (ppb)
7/14/2025
Occurs naturally in some groundwater. Long-term exposure above the legal limit (10 ppb) has been linked to increased cancer risk and cardiovascular disease.
Copper, Free
Detected: 6 UG/L (ppb)
7/14/2025
Inorganics
Common dissolved minerals and salts, e.g. nitrate, fluoride, chloride
Chloride
Detected: 28 MG/L (ppm)
7/14/2025
Sulfate
Detected: 15 MG/L (ppm)
7/14/2025
Minerals
Everyday minerals that mainly affect taste and water hardness
Magnesium
Detected: 7.6 MG/L (ppm)
7/14/2025
Calcium
Detected: 12 MG/L (ppm)
7/14/2025
Sodium
Detected: 22 MG/L (ppm)
7/14/2025
Properties
General water characteristics like pH, hardness, and cloudiness (turbidity)
Hardness, Total (ASCACO3)
Detected: 62 MG/L (ppm)
7/14/2025
pH
Detected: 8 PH
7/14/2025
A measure of how acidic or basic the water is (7 is neutral). Affects taste and plumbing, not a direct health measure.
Calculated Parameters
Values worked out mathematically from other test results, not measured directly
Alkalinity, Bicarbonate
Detected: 63 MG/L (ppm)
7/14/2025
Other
Additional substances tested that don't fit neatly into the categories above
Alkalinity, Total
Detected: 63 MG/L (ppm)
7/14/2025
TDS
Detected: 140 MG/L (ppm)
7/14/2025
Conductivity (at 25°C)
Detected: 260 UMHO/CM
7/14/2025
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.