No health-based violations on EPA record since 2016.
EPA lists no population count. It uses surface water from its own intake.
From EPA's record for CA1910041. PurityMap is independent of Three Valleys MWD.
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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 →Three Valleys MWD's phone number on EPA record is 909-293-7034. Its mailing address is 1021 E. MIRAMAR AVENUE, CLAREMONT, CA 91711.
According to EPA's record, Three Valleys MWD uses surface water from its own intake.
No health-based violations on EPA record since 2016. The record comes from EPA's SDWIS compliance database.
PurityMap has no verified website for Three Valleys MWD. Its phone number on EPA record is 909-293-7034. Its mailing address on EPA record is 1021 E. MIRAMAR AVENUE, CLAREMONT, CA 91711. Your water bill lists the ways to contact your supplier and pay. PurityMap does not take payments.