Los Angeles Cwwd 40 Reg 4 & 34 Lancaster, CA Water Quality
What's in Los Angeles Cwwd 40 Reg 4 & 34 Lancaster's water?
Los Angeles Cwwd 40 Reg 4 & 34 Lancaster has a health-based violation on record, but none in the last five years - an older issue, not necessarily a current one. Population served: 208,129, over 52,956 connections.
Ranked against every other system in this dataset
Los Angeles Cwwd 40 Reg 4 & 34 Lancaster has 5 violations on record in total, 1 of them health-based - ranking it 8,640th of 12,903 systems by violation count, the 33th percentile nationally.
Against the CA average
Los Angeles Cwwd 40 Reg 4 & 34 Lancaster's 1 health-based violations sit within the CA average of 5.8, across 804 systems statewide. The filter guide explains what a violation like this actually calls for.
Most recent violation on record
Los Angeles Cwwd 40 Reg 4 & 34 Lancaster's most recent violation on record is dated 2007-01-09, with the most recent health-based one dated 1992-01-12. Last reported to EPA: 06/22/2026.
The concern categories on record
Los Angeles Cwwd 40 Reg 4 & 34 Lancaster's flagged contaminants and rule violations, grouped by what they actually mean for a filter choice rather than left as EPA's raw code list:
- Microbial contamination / treatment technique - flagged from: Coliform (TCR)
The most severe category on record is microbial contamination / treatment technique, which points toward a microbial-class filter if you want to address it directly.
What Los Angeles Cwwd 40 Reg 4 & 34 Lancaster's record does not cover
This is what Los Angeles Cwwd 40 Reg 4 & 34 Lancaster reported to its state primacy agency and EPA under the Safe Drinking Water Act - real regulatory record, not a lab test of your specific tap. This record - 1 health-based violation on file for Los Angeles Cwwd 40 Reg 4 & 34 Lancaster - stops at the meter and cannot see household plumbing on the other side of it. The guide to what this data misses covers that gap.