Serving roughly 3,464 people in Orange County, California.
Data current as of July 2026
🔍Straight from EPA
🧪Real Lab Results
📅Updated Quarterly
🏠Local Expertise
Results for EAST ORANGE COUNTY WD - RZ
1 water provider directly on file, serving roughly 3,464 people in Orange County, California.
Quick answer: EAST ORANGE COUNTY WD - RZ has no violations on file. One reading is worth knowing about: Perfluorobutanesulfonicacid (PFBS) was measured at 11.6NG/L, among the highest of the 167 providers on file in this area. It's the most notable figure in this system's record among its 167 local peers.
Lead Summary
Alkalinity, Total
Carbon, Total
TDS
Chloride
Sulfate
Nitrate
Perfluorobutanesulfonicacid (PFBS)
Perfluoroheptanoicacid (PFHPA)
Perfluorohexanesulfonicacid (PFHxS)
Perfluorononanoicacid (PFNA)
Perfluoroctanesulfonicacid (PFOS)
Perfluoroctanoicacid (PFOA)
Perfluorohexanoicacid (PFHXA)
Perfluorobutanoicacid (PFBA)
Perfluoropentanoicacid (PFPEA)
Perfluoropentanesulfonicacid (PFPES)
Calcium
Nitrate-Nitrite
Magnesium
Potassium
Sodium
Hardness, Total (ASCACO3)
Bromide
Alkalinity, Bicarbonate
Fluoride
Utility EAST ORANGE COUNTY WD - RZPopulation served 3,464Owner Local government
No violations on file
Contaminants found
Metals
Naturally occurring or corrosion-related elements, e.g. lead, arsenic, copper
Lead Summary
Detected: 0.00547 mg/L (ppm)
12/31/2024
Inorganics
Common dissolved minerals and salts, e.g. nitrate, fluoride, chloride
Chloride
Detected: 97.6 MG/L (ppm)
7/15/2025
Sulfate
Detected: 120 MG/L (ppm)
7/15/2025
Nitrate
Detected: 2.73 MG/L (ppm)
7/15/2025
Commonly from agricultural fertilizer runoff or septic systems. Above the legal limit, it's an immediate concern especially for infants.
Nitrate-Nitrite
Detected: 2.9 MG/L (ppm)
4/15/2025
Fluoride
Detected: 0.16 MG/L (ppm)
4/15/2025
Often added deliberately for dental health; can also occur naturally.
Minerals
Everyday minerals that mainly affect taste and water hardness
Calcium
Detected: 96.7 MG/L (ppm)
6/9/2025
Magnesium
Detected: 21.5 MG/L (ppm)
4/15/2025
Potassium
Detected: 2.2 MG/L (ppm)
4/15/2025
Sodium
Detected: 59.9 MG/L (ppm)
4/15/2025
Properties
General water characteristics like pH, hardness, and cloudiness (turbidity)
Hardness, Total (ASCACO3)
Detected: 322 MG/L (ppm)
4/15/2025
VOCs (Volatile Organic Compounds)
Industrial solvents and fuel-related chemicals that evaporate easily
Bromide
Detected: 0.17 MG/L (ppm)
4/15/2025
Calculated Parameters
Values worked out mathematically from other test results, not measured directly
Alkalinity, Bicarbonate
Detected: 221 MG/L (ppm)
4/15/2025
Other
Additional substances tested that don't fit neatly into the categories above
Alkalinity, Total
Detected: 189 MG/L (ppm)
7/15/2025
Carbon, Total
Detected: 0.32 MG/L (ppm)
7/15/2025
TDS
Detected: 490 MG/L (ppm)
9/3/2025
Perfluorobutanesulfonicacid (PFBS)
Detected: 11.6 NG/L (ppt)
10/7/2025
Perfluoroheptanoicacid (PFHPA)
Detected: 8.1 NG/L (ppt)
10/7/2025
Perfluorohexanesulfonicacid (PFHxS)
Detected: 12.3 NG/L (ppt)
10/7/2025
Perfluorononanoicacid (PFNA)
Detected: 3.2 NG/L (ppt)
10/7/2025
Perfluoroctanesulfonicacid (PFOS)
Detected: 30.5 NG/L (ppt)
10/7/2025
One of two PFAS with an enforceable federal limit (4 ppt) since 2024.
Perfluoroctanoicacid (PFOA)
Detected: 20.3 NG/L (ppt)
10/7/2025
One of two PFAS with an enforceable federal limit (4 ppt) since 2024.
Perfluorohexanoicacid (PFHXA)
Detected: 17.1 NG/L (ppt)
10/7/2025
Perfluorobutanoicacid (PFBA)
Detected: 10.4 NG/L (ppt)
10/7/2025
Perfluoropentanoicacid (PFPEA)
Detected: 21.7 NG/L (ppt)
10/7/2025
Perfluoropentanesulfonicacid (PFPES)
Detected: 2.5 NG/L (ppt)
10/7/2025
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.