LOPEZ PROJECT
PWSID: CA4010022 · San Luis Obispo, CA · Serves 1,569 people
According to EPA Safe Drinking Water Information System (SDWIS), LOPEZ PROJECT (PWSID CA4010022) in San Luis Obispo, CA is listed as a CWS water system covering about 1,569 people. The same extract lists 2 health-based violation records spanning 2025-2025. Those 2 health-based rows for LOPEZ PROJECT cover contaminants such as Revised Total Coliform Rule; they remain historical EPA registry entries, not a current compliance or drinkability score.
LOPEZ PROJECT has 2 health-based violation records in this historical extract. Monitoring and reporting records are not included.
PlainEnviro's health-based SDWIS extract covers monitoring and reporting violations only -- it does not include unresolved enforcement actions in progress or corrective steps a utility has taken since the extract date. 1 distinct EPA contaminant code appears in this system's record, including Revised Total Coliform Rule. Recorded violations span 2025–2025. Day-to-day primacy enforcement for this system runs through the California drinking-water program, not EPA directly.
A historical health-based record does not necessarily describe current water quality or compliance. The most authoritative current source is the utility's annual Consumer Confidence Report. For enforcement history and corrective-action orders, consult EPA ECHO and the California state drinking-water program's public portal.
System Details
- EPA ID (PWSID)
- CA4010022
- System Type
- CWS
- Water Source
- Surface Water
- Location
- San Luis Obispo, CA
- Population Served
- 1,569
- Health Violations
- Yes (2)
What contaminants are in this water system?
| Contaminant | Violations | Health-Based |
|---|---|---|
| Revised Total Coliform Rule | 2 | 2 |
Violation History (2)
| Contaminant | Health | Date |
|---|---|---|
| Revised Total Coliform Rule | Yes | Apr 1, 2025 |
| Revised Total Coliform Rule | Yes | Apr 1, 2025 |
Frequently Asked Questions
What does EPA SDWIS list for LOPEZ PROJECT?
How many people does LOPEZ PROJECT serve?
What violations does LOPEZ PROJECT have?
What contaminants have been found in LOPEZ PROJECT water?
Compare beyond California
Nationwide peers by violations & population served
Cross-state SDWIS systems nearest LOPEZ PROJECT on cumulative violation count (2) and EPA-reported population served (1,569). Violation-count peers include SAINT REGIS MOHAWK TRIBE, REDBY/RED LAKE, Kickapoo Traditional Tribe. Population peers include MID-TEX UTILITIES, BEAVER, GARVIN CO RWD #2.
Similar violation count
Nearest cross-state community systems (500+ served) by SDWIS violations on record.
Similar population served
Nearest cross-state systems by EPA SDWIS population_served (same 500+ gate).
Nearby Water Systems
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About This Data
LOPEZ PROJECT (CA4010022) is drawn from EPA SDWIS. Nearby county systems in this extract include SAN LUIS OBISPO WATER DEPARTMENT; CITY OF PASO ROBLES WATER DIVISION; ATASCADERO MUTUAL WATER CO; CITY OF ARROYO GRANDE UTILITIES DIVISION. Health-based rows (2 MCL/TT) are historical registry state, not a current drinkability score.
Source: U.S. Environmental Protection Agency, SDWIS Federal Reporting Services
Read our methodology - how this data is sourced, computed, and verified.