MORGAN HILL is served by 1 water provider on file with the EPA.
Data current as of July 2026
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Results for MORGAN HILL, CA
1 water provider on file serving this city.
Quick answer: MORGAN HILL's water has no violation currently counted toward its compliance status. EPA's record shows a Nitrate violation dating to 06/01/1988 (38 years ago) — because it's more than five years past its deadline, EPA's policy no longer treats it as part of this system's current standing, though it remains on the public record.
Lead Summary
Lithium
PFPEA
PFHXA
PFHXS
Totalhaloaceticacids (HAA5)
TTHM
Bromoform
Dibromochloromethane
Bromodichloromethane
Dibromoaceticacid
Aggressive Index
Magnesium
Potassium
Sodium
Calcium
Alkalinity, Total
Alkalinity, Bicarbonate
Hardness, Total (ASCACO3)
TDS
Chloride
Sulfate
Fluoride
Nitrate
Nitrate-Nitrite
Radium-228
Combined Radium (-226 & -228)
pH
Chromium, Hex
Barium
Conductivity (at 25°C)
Violations on file
Nitrate
Older/archived health-based violation
Found at 1 of 1 provider
Commonly from agricultural fertilizer runoff or septic systems. Above the legal limit, it's an immediate concern especially for infants.
Contaminants found
Metals
Naturally occurring or corrosion-related elements, e.g. lead, arsenic, copper
Lead Summary
Detected: 0 mg/L (ppm)
12/31/2024
Chromium, Hex
Detected: 1.63 UG/L (ppb)
6/25/2025
Barium
Detected: 130 UG/L (ppb)
2/12/2025
Disinfection Byproducts
Formed when chlorine used to disinfect water reacts with organic matter
Totalhaloaceticacids (HAA5)
Detected: 1.6 UG/L (ppb)
7/29/2025
TTHM
Detected: 6.22 UG/L (ppb)
7/29/2025
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: 4.41 UG/L (ppb)
7/29/2025
Dibromochloromethane
Detected: 1.81 UG/L (ppb)
7/29/2025
Bromodichloromethane
Detected: 1.05 UG/L (ppb)
4/22/2025
Inorganics
Common dissolved minerals and salts, e.g. nitrate, fluoride, chloride
Chloride
Detected: 69 MG/L (ppm)
2/12/2025
Sulfate
Detected: 39 MG/L (ppm)
2/12/2025
Fluoride
Detected: 0.14 MG/L (ppm)
2/12/2025
Often added deliberately for dental health; can also occur naturally.
Nitrate
Detected: 3.7 MG/L (ppm)
6/25/2025
Commonly from agricultural fertilizer runoff or septic systems. Above the legal limit, it's an immediate concern especially for infants.
Nitrate-Nitrite
Detected: 3.5 MG/L (ppm)
2/12/2025
Minerals
Everyday minerals that mainly affect taste and water hardness
Magnesium
Detected: 32 MG/L (ppm)
2/12/2025
Potassium
Detected: 1.4 MG/L (ppm)
2/12/2025
Sodium
Detected: 31 MG/L (ppm)
2/12/2025
Calcium
Detected: 49 MG/L (ppm)
2/12/2025
Properties
General water characteristics like pH, hardness, and cloudiness (turbidity)
Hardness, Total (ASCACO3)
Detected: 254 MG/L (ppm)
2/12/2025
pH
Detected: 7.74 PH
2/12/2025
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: 10.9 µg/L (ppb)
1/10/2024
Occurs naturally in some groundwater. Not currently federally regulated in drinking water.
PFPEA
Detected: 0.0031 µg/L (ppb)
12/3/2024
PFHXA
Detected: 0.0034 µg/L (ppb)
12/3/2024
PFHXS
Detected: 0.003 µg/L (ppb)
1/10/2024
Calculated Parameters
Values worked out mathematically from other test results, not measured directly
Alkalinity, Bicarbonate
Detected: 140 MG/L (ppm)
2/12/2025
Other
Additional substances tested that don't fit neatly into the categories above
Dibromoaceticacid
Detected: 1.6 UG/L (ppb)
7/29/2025
Aggressive Index
Detected: 11.97 AGGR
2/12/2025
Alkalinity, Total
Detected: 140 MG/L (ppm)
2/12/2025
TDS
Detected: 340 MG/L (ppm)
2/12/2025
Radium-228
Detected: 0.727 PCI/L
9/10/2025
Combined Radium (-226 & -228)
Detected: 0.857 PCI/L
9/10/2025
A naturally occurring radioactive element found in some groundwater.
Conductivity (at 25°C)
Detected: 630 UMHO/CM
2/12/2025
Filtration considerations: General system types, not a specific product recommendation.