TRINIDAD is served by 1 water provider on file with the EPA.
Data current as of July 2026
🔍Straight from EPA
🧪Real Lab Results
📅Updated Quarterly
🏠Local Expertise
Results for TRINIDAD, CA
1 water provider on file serving this city.
Quick answer: TRINIDAD's water has no violations on file and no single reading stands out against its peers (1 other providers in this area). It serves roughly 1,072 people, and the full breakdown below reflects everything EPA and California have on record for it.
Lead Summary
Copper Summary
Carbon, Total
Alkalinity, Total
Chromium, Hex
Monochloroaceticacid
Dichloroaceticacid
Trichloroaceticacid
Totalhaloaceticacids (HAA5)
Chloroform
Bromodichloromethane
Dibromochloromethane
TTHM
Copper, Free
Lead
Contaminants found
Metals
Naturally occurring or corrosion-related elements, e.g. lead, arsenic, copper
Lead Summary
Detected: 0.00154 mg/L (ppm)
12/31/2025
Copper Summary
Detected: 19 mg/L (ppm)
12/31/2005
Chromium, Hex
Detected: 0.17 UG/L (ppb)
1/20/2025
Copper, Free
Detected: 300 UG/L (ppb)
8/19/2025
Lead
Detected: 1.1 UG/L (ppb)
8/15/2025
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.
Disinfection Byproducts
Formed when chlorine used to disinfect water reacts with organic matter
Totalhaloaceticacids (HAA5)
Detected: 37 UG/L (ppb)
7/29/2025
Chloroform
Detected: 16 UG/L (ppb)
7/29/2025
One of the individual trihalomethane disinfection byproducts, formed when chlorine reacts with organic matter.
Bromodichloromethane
Detected: 9.5 UG/L (ppb)
7/29/2025
Dibromochloromethane
Detected: 4 UG/L (ppb)
7/29/2025
TTHM
Detected: 30 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.
Other
Additional substances tested that don't fit neatly into the categories above
Carbon, Total
Detected: 1.8 MG/L (ppm)
9/10/2025
Alkalinity, Total
Detected: 14 MG/L (ppm)
9/10/2025
Monochloroaceticacid
Detected: 5.6 UG/L (ppb)
7/29/2025
Dichloroaceticacid
Detected: 13 UG/L (ppb)
7/29/2025
Trichloroaceticacid
Detected: 18 UG/L (ppb)
7/29/2025
Filtration considerations: General system types, not a specific product recommendation.
Contaminant
Whole-House Carbon
Under-Sink RO
Under-Sink Carbon
Total Trihalomethanes (TTHM)
Yes
Yes
Yes
Haloacetic Acids (HAA5)
Yes
Yes
Yes
Chloroform
Yes
Yes
Yes
Chlorine / Taste
Yes
Yes
Yes
Sediment / Turbidity
Yes
Yes
Yes
Trichloroethylene
Yes
Yes
Yes
Tetrachloroethylene
Yes
Yes
Yes
cis-1,2-Dichloroethylene
Yes
Yes
Yes
1,1-Dichloroethylene
Yes
Yes
Yes
Bromoform
Yes
Yes
Yes
Bromodichloromethane
Yes
Yes
Yes
Dibromochloromethane
Yes
Yes
Yes
1,1,2-Trichloroethane
Yes
Yes
Yes
Vinyl Chloride
Yes
Yes
Yes
Carbon Tetrachloride
Yes
Yes
Yes
Benzene
Yes
Yes
Yes
Toluene
Yes
Yes
Yes
Xylene
Yes
Yes
Yes
Totalhaloaceticacids (HAA5)
Yes
Yes
Yes
Lead
Partial
Yes
Partial
Arsenic
Partial
Yes
Partial
Chromium-6 (Hexavalent)
Partial
Yes
Partial
Copper
Partial
Yes
Partial
Combined Uranium
Partial
Yes
Partial
PFOA
Partial
Yes*
Partial
PFOS
Partial
Yes*
Partial
Nitrate
Partial
Yes
Partial
Combined Radium
Partial
Yes
Partial
Carbon, Total
Partial
Yes
Partial
Alkalinity, Total
Partial
Yes
Partial
Chromium, Hex
Partial
Yes
Partial
Monochloroaceticacid
Partial
Yes
Partial
Dichloroaceticacid
Partial
Yes
Partial
Trichloroaceticacid
Partial
Yes
Partial
Copper, Free
Partial
Yes
Partial
Coliform Bacteria (indicator)
No
Yes
No
Individual water providers
TRINIDAD, CITY OFNo violations on file — pop. 1,072