No open health-based violations on EPA record in the last 10 years; latest legal-limit breach in the period starting April 2025.
Serves about 1,569 people (31 connections) with surface water from its own intake, and buys water from Central Coast Water Authority.
From EPA's record for CA4010022. PurityMap is independent of Lopez Project.
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1 health-based violation in the last 10 years, from EPA's SDWIS compliance database.
| Period | Contaminant | Measured | Legal limit | EPA status |
|---|---|---|---|---|
| From April 2025 | E. coli | – | – | Resolved |
No lab results for other contaminants (like PFAS) are on file for this system. EPA required that testing from systems serving more than 3,300 people, plus a sample of smaller ones.
Screening tells you if something is worth a closer look; a lab result is the number you can act on.
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Screening: quick check, not lab-grade
Safe Home (EnviroTestKits)
Lead, read as one of three ranges: 0–4, 5–15 or 15+ ppb
Turnaround: 5 minutes
What it can't tell you: It shows a lead range, not an exact level, and tests nothing else unless you pay extra for the optional lab test.
Lab-certified results
ETR Laboratories
50+ substances, including lead, copper, arsenic, nitrate, hardness and coliform bacteria
Environmental Testing and Research Laboratories (ETR Labs), Leominster, MA · ISO/IEC 17025:2017, ANAB certificate AT-2638 · 2–4 business days after the lab receives it
What it can't tell you: It does not test PFAS, and not every result on the panel falls under the lab's accredited scope.
Get PurityMap updates about this water system.
Follow this water →Lopez Project's phone number on EPA record is 805-473-7156. Its mailing address is County Government Center Room 206, SAN LUIS OBISPO, CA 93408.
According to EPA's record, Lopez Project uses surface water from its own intake, and buys water from Central Coast Water Authority.
EPA's record shows 1 health-based violation for Lopez Project in the 10 years to July 9, 2026. No open health-based violations on EPA record in the last 10 years. The latest legal-limit breach on record was in the period starting April 2025. The record comes from EPA's SDWIS compliance database.
The 90th-percentile lead result in Lopez Project's latest lead and copper round, which ended in December 2025, was 0.79 µg/L, below the federal action level of 15 µg/L.
PurityMap has no verified website for Lopez Project. Its phone number on EPA record is 805-473-7156. Its mailing address on EPA record is County Government Center Room 206, SAN LUIS OBISPO, CA 93408. Your water bill lists the ways to contact your supplier and pay. PurityMap does not take payments.