No health-based violations on EPA record since 2016.
Serves about 11,073 people (3,691 connections) with surface water bought from Harris County FWSD 51, Harris County FWSD 47 and North Channel Water Authority.
From EPA's record for TX1010239. PurityMap is independent of Harris County WCID 36.
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No health-based violations in the last 10 years, from EPA's SDWIS compliance database.
EPA required this system to test for 30 unregulated and emerging contaminants, from April 2024 to January 2025.
| Contaminant | Result | Limit | Status | Sampled | Source |
|---|---|---|---|---|---|
| Lithium | 15.4 µg/L | 10 µg/L EPA health reference level (screening, not a legal limit)Screening level, not a legal limit | Above the referenced health-based guidance value | 2024-04-23 to 2025-01-08 | UCMR5 Analytical Results: HARRIS COUNTY WCID 36 (TX1010239) |
| Perfluorooctanesulfonic acid (PFOS) | 4 ng/L | 4.0 ng/L federal MCL (2024) | Within a historical reference; current applicability unverified | 2024-04-23 to 2025-01-08 | UCMR5 Analytical Results: HARRIS COUNTY WCID 36 (TX1010239) |
| Perfluorobutanesulfonic acid (PFBS) | 3 ng/L | 2,000 ng/L EPA health advisory (screening, not a legal limit)Screening level, not a legal limit | Within the referenced health-based guidance value | 2024-04-23 to 2025-01-08 | UCMR5 Analytical Results: HARRIS COUNTY WCID 36 (TX1010239) |
| Perfluorohexanoic acid (PFHxA) | 5.7 ng/L | 400,000 ng/L Michigan EGLE state MCL (strictest US state) | Within a historical reference; current applicability unverified | 2024-04-23 to 2025-01-08 | UCMR5 Analytical Results: HARRIS COUNTY WCID 36 (TX1010239) |
| Perfluorobutanoic acid (PFBA) | 6.1 ng/L | No federal or state limit; shown for transparency | Detected, no limit | 2024-04-23 to 2025-01-08 | UCMR5 Analytical Results: HARRIS COUNTY WCID 36 (TX1010239) |
| Perfluoropentanoic acid (PFPeA) | 6.1 ng/L | No federal or state limit; shown for transparency | Detected, no limit | 2024-04-23 to 2025-01-08 | UCMR5 Analytical Results: HARRIS COUNTY WCID 36 (TX1010239) |
| 11-Chloroeicosafluoro-3-oxaundecane-1-sulfonic acid (11Cl-PF3OUdS) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-04-23 to 2025-01-08 | UCMR5 Analytical Results: HARRIS COUNTY WCID 36 (TX1010239) |
| 1H, 1H, 2H, 2H-perfluorodecane sulfonic acid (8:2 FTS) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-04-23 to 2025-01-08 | UCMR5 Analytical Results: HARRIS COUNTY WCID 36 (TX1010239) |
| 1H, 1H, 2H, 2H-perfluorohexane sulfonic acid (4:2 FTS) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-04-23 to 2025-01-08 | UCMR5 Analytical Results: HARRIS COUNTY WCID 36 (TX1010239) |
| 1H, 1H, 2H, 2H-perfluorooctane sulfonic acid (6:2 FTS) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-04-23 to 2025-01-08 | UCMR5 Analytical Results: HARRIS COUNTY WCID 36 (TX1010239) |
| 4,8-Dioxa-3H-perfluorononanoic acid (ADONA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-04-23 to 2025-01-08 | UCMR5 Analytical Results: HARRIS COUNTY WCID 36 (TX1010239) |
| 9-Chlorohexadecafluoro-3-oxanone-1-sulfonic acid (9Cl-PF3ONS) | < 2 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-04-23 to 2025-01-08 | UCMR5 Analytical Results: HARRIS COUNTY WCID 36 (TX1010239) |
| Hexafluoropropylene oxide dimer acid (HFPO-DA) (GenX chemicals) | < 5 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2024-04-23 to 2025-01-08 | UCMR5 Analytical Results: HARRIS COUNTY WCID 36 (TX1010239) |
| N-ethyl perfluorooctanesulfonamidoacetic acid (NEtFOSAA) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-04-23 to 2025-01-08 | UCMR5 Analytical Results: HARRIS COUNTY WCID 36 (TX1010239) |
| N-methyl perfluorooctanesulfonamidoacetic acid (NMeFOSAA) | < 6 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-04-23 to 2025-01-08 | UCMR5 Analytical Results: HARRIS COUNTY WCID 36 (TX1010239) |
| Nonafluoro-3,6-dioxaheptanoic acid (NFDHA) | < 20 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-04-23 to 2025-01-08 | UCMR5 Analytical Results: HARRIS COUNTY WCID 36 (TX1010239) |
| Perfluoro (2-ethoxyethane) sulfonic acid (PFEESA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-04-23 to 2025-01-08 | UCMR5 Analytical Results: HARRIS COUNTY WCID 36 (TX1010239) |
| Perfluoro-3-methoxypropanoic acid (PFMPA) | < 4 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-04-23 to 2025-01-08 | UCMR5 Analytical Results: HARRIS COUNTY WCID 36 (TX1010239) |
| Perfluoro-4-methoxybutanoic acid (PFMBA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-04-23 to 2025-01-08 | UCMR5 Analytical Results: HARRIS COUNTY WCID 36 (TX1010239) |
| Perfluorodecanoic acid (PFDA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-04-23 to 2025-01-08 | UCMR5 Analytical Results: HARRIS COUNTY WCID 36 (TX1010239) |
| Perfluorododecanoic acid (PFDoA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-04-23 to 2025-01-08 | UCMR5 Analytical Results: HARRIS COUNTY WCID 36 (TX1010239) |
| Perfluoroheptanesulfonic acid (PFHpS) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-04-23 to 2025-01-08 | UCMR5 Analytical Results: HARRIS COUNTY WCID 36 (TX1010239) |
| Perfluoroheptanoic acid (PFHpA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-04-23 to 2025-01-08 | UCMR5 Analytical Results: HARRIS COUNTY WCID 36 (TX1010239) |
| Perfluorohexanesulfonic acid (PFHxS) | < 3 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2024-04-23 to 2025-01-08 | UCMR5 Analytical Results: HARRIS COUNTY WCID 36 (TX1010239) |
| Perfluorononanoic acid (PFNA) | < 4 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2024-04-23 to 2025-01-08 | UCMR5 Analytical Results: HARRIS COUNTY WCID 36 (TX1010239) |
| Perfluorooctanoic acid (PFOA) | < 4 ng/L | 4.0 ng/L federal MCL (2024) | Not detected above the reporting limit | 2024-04-23 to 2025-01-08 | UCMR5 Analytical Results: HARRIS COUNTY WCID 36 (TX1010239) |
| Perfluoropentanesulfonic acid (PFPeS) | < 4 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-04-23 to 2025-01-08 | UCMR5 Analytical Results: HARRIS COUNTY WCID 36 (TX1010239) |
| Perfluorotetradecanoic acid (PFTA) | < 8 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-04-23 to 2025-01-08 | UCMR5 Analytical Results: HARRIS COUNTY WCID 36 (TX1010239) |
| Perfluorotridecanoic acid (PFTrDA) | < 7 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-04-23 to 2025-01-08 | UCMR5 Analytical Results: HARRIS COUNTY WCID 36 (TX1010239) |
| Perfluoroundecanoic acid (PFUnA) | < 2 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-04-23 to 2025-01-08 | UCMR5 Analytical Results: HARRIS COUNTY WCID 36 (TX1010239) |
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 →Harris County WCID 36's phone number on EPA record is 713-453-5493. Its mailing address is 903 HOLLYWOOD ST, HOUSTON, TX 77015-4649.
According to EPA's record, Harris County WCID 36 uses surface water bought from Harris County FWSD 51, Harris County FWSD 47 and North Channel Water Authority.
No health-based violations on EPA record since 2016. The record comes from EPA's SDWIS compliance database.
The 90th-percentile lead result in Harris County WCID 36's latest lead and copper round, which ended in December 2025, was 1 µg/L, below the federal action level of 15 µg/L.
PurityMap has no verified website for Harris County WCID 36. Its phone number on EPA record is 713-453-5493. Its mailing address on EPA record is 903 HOLLYWOOD ST, HOUSTON, TX 77015-4649. Your water bill lists the ways to contact your supplier and pay. PurityMap does not take payments.