No open health-based violations on EPA record in the last 10 years.
Serves about 1,581 people (527 connections) with surface water bought from Harris County WCID Fondren Road.
From EPA's record for TX1011911. PurityMap is independent of Southwest Harris County MUD 1.
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3 health-based violations in the last 10 years, from EPA's SDWIS compliance database.
| Period | Contaminant | Measured | Legal limit | EPA status |
|---|---|---|---|---|
| From April 2022 | Lead and Copper Rule | – | TT | Resolved |
| From March 2022 | Lead and Copper Rule | – | TT | Resolved |
| From December 2021 | Lead and Copper Rule | – | TT | 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.
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Follow this water →Southwest Harris County MUD 1's phone number on EPA record is 713-864-5466. Its mailing address is 2727 ALLEN PKWY STE 1100, HOUSTON, TX 77019-2191.
According to EPA's record, Southwest Harris County MUD 1 uses surface water bought from Harris County WCID Fondren Road.
EPA's record shows 3 health-based violations for Southwest Harris County MUD 1 in the 10 years to July 9, 2026. No open health-based violations on EPA record in the last 10 years. EPA also lists 5 missed or late tests or reports in 10 years. The record comes from EPA's SDWIS compliance database.
The 90th-percentile lead result in Southwest Harris County MUD 1's latest lead and copper round, which ended in December 2025, was 2.51 µg/L, below the federal action level of 15 µg/L.
PurityMap has no verified website for Southwest Harris County MUD 1. Its phone number on EPA record is 713-864-5466. Its mailing address on EPA record is 2727 ALLEN PKWY STE 1100, HOUSTON, TX 77019-2191. Your water bill lists the ways to contact your supplier and pay. PurityMap does not take payments.