Serving roughly 6,214 people in Los Angeles County, California.
Data current as of July 2026
🔍Straight from EPA
🧪Real Lab Results
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Results for NORTHROP GRUMMAN CORP.
1 water provider directly on file, serving roughly 6,214 people in Los Angeles County, California.
Quick answer: NORTHROP GRUMMAN CORP. has no violations on file. One reading is worth knowing about: PFPEA was measured at 0.0376µg/L, among the highest of the 601 providers on file in this area. It's the most notable figure in this system's record among its 601 local peers.
Lead Summary
PFHXA
PFPEA
PFHXS
PFOA
PFHPA
PFBS
PFBA
Pfpes
Nitrate
Perfluorobutanesulfonicacid (PFBS)
Perfluoroheptanoicacid (PFHPA)
Perfluorohexanesulfonicacid (PFHxS)
Perfluoroctanoicacid (PFOA)
Perfluorohexanoicacid (PFHXA)
Iron
Manganese
Chromium, Hex
Perchlorate
Utility NORTHROP GRUMMAN CORP.Population served 6,214Owner Private
No violations on file
Contaminants found
Metals
Naturally occurring or corrosion-related elements, e.g. lead, arsenic, copper
Lead Summary
Detected: 0 mg/L (ppm)
12/31/2023
Iron
Detected: 290 UG/L (ppb)
9/16/2025
Mostly an aesthetic issue (metallic taste, staining) rather than a health concern at typical levels.
Manganese
Detected: 27 UG/L (ppb)
3/18/2025
Mainly a taste/staining concern at typical levels; long-term neurological research at high chronic exposure is ongoing.
Chromium, Hex
Detected: 2.2 UG/L (ppb)
3/18/2025
Inorganics
Common dissolved minerals and salts, e.g. nitrate, fluoride, chloride
Nitrate
Detected: 2.4 MG/L (ppm)
9/16/2025
Commonly from agricultural fertilizer runoff or septic systems. Above the legal limit, it's an immediate concern especially for infants.
PFAS & Emerging Contaminants
Human-made "forever chemicals" and other substances not yet fully regulated
PFHXA
Detected: 0.0044 µg/L (ppb)
9/9/2025
PFPEA
Detected: 0.0376 µg/L (ppb)
9/9/2025
PFHXS
Detected: 0.0035 µg/L (ppb)
9/9/2025
PFOA
Detected: 0.0052 µg/L (ppb)
9/9/2025
One of two PFAS with an enforceable federal limit (4 ppt) since 2024.
PFHPA
Detected: 0.0047 µg/L (ppb)
9/9/2025
PFBS
Detected: 0.0647 µg/L (ppb)
9/9/2025
PFBA
Detected: 0.0221 µg/L (ppb)
9/9/2025
Pfpes
Detected: 0.0245 µg/L (ppb)
9/9/2025
Other
Additional substances tested that don't fit neatly into the categories above
Perfluorobutanesulfonicacid (PFBS)
Detected: 540 NG/L (ppt)
10/7/2025
Perfluoroheptanoicacid (PFHPA)
Detected: 10 NG/L (ppt)
10/7/2025
Perfluorohexanesulfonicacid (PFHxS)
Detected: 5 NG/L (ppt)
10/7/2025
Perfluoroctanoicacid (PFOA)
Detected: 2.7 NG/L (ppt)
10/7/2025
One of two PFAS with an enforceable federal limit (4 ppt) since 2024.
Perfluorohexanoicacid (PFHXA)
Detected: 5.9 NG/L (ppt)
10/7/2025
Perchlorate
Detected: 1.2 UG/L (ppb)
5/6/2025
Can occur naturally or from industrial/military sources; may interfere with thyroid function at elevated levels.
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.