Is SAN LUIS OBISPO WATER DEPARTMENT's water safe to drink?
SAN LUIS OBISPO WATER DEPARTMENT has a health-based violation on record, but none in the last five years - an older issue, not necessarily a current one. Population served: 47,788, over 17,012 connections.
Ranked against every other system in this dataset
Out of 12,903 systems in this dataset, SAN LUIS OBISPO WATER DEPARTMENT ranks 9,181th by violation burden (29th percentile) - 1 violation total, 1 health-based.
How SAN LUIS OBISPO WATER DEPARTMENT compares within CA
Among the 803 CA systems in this dataset, the average is 5.8 health-based violations - SAN LUIS OBISPO WATER DEPARTMENT's 1 is at or below that. See the lead and copper guide for why lead counts differently.
Most recent violation on record
The last violation EPA has on record for SAN LUIS OBISPO WATER DEPARTMENT is from 2015-01-04 (health-based: 2015-01-04). Last reported to EPA: 06/22/2026.
What kind of problem, specifically
SAN LUIS OBISPO WATER DEPARTMENT'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:
- Disinfection byproducts - flagged from: TTHM
The most severe category on record is disinfection byproducts, which points toward a carbon-class filter if you want to address it directly.
What this data is and is not
SAN LUIS OBISPO WATER DEPARTMENT's numbers here come from its own required reporting to EPA under the Safe Drinking Water Act, not from an independent test of your glass of water. Between the utility's meter and SAN LUIS OBISPO WATER DEPARTMENT's customers' taps is household plumbing, invisible to a system-level record ranked 9,181th of 12,903 by violation count. The guide to what this data misses covers that gap.