No health-based violations on EPA record since 2016.
Serves about 1,437 people (495 connections) with surface water bought from Walnut Valley Water District and Covina Valley Water Company.
From EPA's record for CA1910200. PurityMap is independent of Suburban Water Systems-Covina Knolls.
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No health-based violations in the last 10 years, from EPA's SDWIS compliance database.
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.
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Follow this water →Suburban Water Systems-Covina Knolls's phone number on EPA record is 626-543-2532. Its mailing address is 1325 N. GRAND AVENUE SUITE 100, COVINA, CA 91724.
According to EPA's record, Suburban Water Systems-Covina Knolls uses surface water bought from Walnut Valley Water District and Covina Valley Water Company.
No health-based violations on EPA record since 2016. The record comes from EPA's SDWIS compliance database.
Lead was not detected at the 90th percentile of tap samples in Suburban Water Systems-Covina Knolls's latest lead and copper round, which ended in December 2025. The federal action level is 15 µg/L.
PurityMap has no verified website for Suburban Water Systems-Covina Knolls. Its phone number on EPA record is 626-543-2532. Its mailing address on EPA record is 1325 N. GRAND AVENUE SUITE 100, COVINA, CA 91724. Your water bill lists the ways to contact your supplier and pay. PurityMap does not take payments.