Short answer: No measured result is above a legal limit; lithium sits above a screening level. Horizon Regional MUD serves 31,542 residents.
Your water bill or annual water quality report names your actual supplier.
HORIZON REGIONAL MUD (EPA PWSID TX0710005) delivers groundwater to 31,542 residents. This report reflects 29 individual PFAS result(s) from the source UCMR5 observations and the latest Lead & Copper Rule 90th-percentile result. Water hardness and disinfectant type are pending the utility's own annual report.
0health-based violations in the last 10 years
From EPA SDWIS. A clean violation history means no enforcement action was recorded; it does not cover contaminants without a limit.
No result is not a pass. Your utility's annual water quality report may list them, and a certified lab test covers your own tap.
Plumbing inside a home can add lead that the system record can't show. A tap test tells you what reaches your glass.
lead 0.71 µg/L, below the 15 µg/L action level (detected below the limit); 1 galvanized line to replace (context, not a tap measurement)
Lithium 81.5 µg/L, above the 10.0 µg/L EPA health reference level
Screening tells you if something is worth a closer look; a lab result is the number you can act on.
As an Amazon Associate, PurityMap earns from qualifying purchases. Affiliate disclosure.
Screening: quick check, not lab-grade
Safe Home (EnviroTestKits)
Lead, read as one of three ranges: 0–4, 5–15 or 15+ ppb
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
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.
When your results arrive, read them here →
Each card names which Horizon City findings its current certification covers, and which it doesn't.
As an Amazon Associate, PurityMap earns from qualifying purchases. A product appears here only when a current certification record covers at least one identified concern; every concern stays listed. The retail offer is looked up afterwards and never changes which products appear or their order. Affiliate disclosure.
PurityMap does not give a safe/unsafe verdict; it shows what the public records measured. For Horizon City, no regulated PFAS were detected in EPA's 2024 testing; the lead 90th-percentile result was 0.71 µg/L against the 15 µg/L action level. HORIZON REGIONAL MUD (PWSID TX0710005) has a Purity Score of 99/100 (confidence: moderate), assessed at the water-system level and computed only from contaminants that were measured. Water can change in your own pipes, so a certified test is the only way to know what comes out of your tap.
HORIZON REGIONAL MUD (PWS ID TX0710005) is the public water system on record for Horizon City, Texas, serving about 31,542 people. Confirm the utility on your water bill before acting on a specific finding.
Groundwater (primary source of record in EPA SDWIS).
None of the 29 PFAS in EPA's UCMR 5 testing (2023-09-19 to 2024-03-26) was detected. "Not detected" means below the lab's reporting limit, not proven zero.
HORIZON REGIONAL MUD's most recent lead 90th-percentile result (2025) was 0.71 µg/L, below the 15 µg/L action level. That figure comes from sampled homes; lead usually enters from a building's own pipes and fixtures, so only a test at your tap tells you what you drink.
PurityMap's current record for Horizon City holds 31 findings: 1 above a reference, 1 detected within the reference and 29 not detected. Each finding links to its dated public record; a parameter that was never monitored is shown as pending, not as a pass.
Follow Horizon City's water
One email when a new sampling round is published, a result moves above or below its reference, or the system's score changes.
Double opt-in: we email a confirmation link. Unsubscribe anytime. No spam.
| Contaminant | Result | Benchmark | Status | Sampled | Source |
|---|---|---|---|---|---|
| Lithium | 81.5 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 | 2023-09-19 to 2024-03-26 | UCMR5 Analytical Results: HORIZON REGIONAL MUD (TX0710005) |
| Lead (90th percentile) | 0.708 µg/L | 15 µg/L federal action level | Below the listed reference | 2025–2025 monitoring period | Lead & Copper Rule 90th-percentile: HORIZON REGIONAL MUD (TX0710005) |
| Contaminant | Result | Benchmark | Status | Sampled | Source |
|---|---|---|---|---|---|
| 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 | 2023-09-19 to 2024-03-26 | UCMR5 Analytical Results: HORIZON REGIONAL MUD (TX0710005) |
| 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 | 2023-09-19 to 2024-03-26 | UCMR5 Analytical Results: HORIZON REGIONAL MUD (TX0710005) |
| 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 | 2023-09-19 to 2024-03-26 | UCMR5 Analytical Results: HORIZON REGIONAL MUD (TX0710005) |
| 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 | 2023-09-19 to 2024-03-26 | UCMR5 Analytical Results: HORIZON REGIONAL MUD (TX0710005) |
| 4,8-Dioxa-3H-perfluorononanoic acid (ADONA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-09-19 to 2024-03-26 | UCMR5 Analytical Results: HORIZON REGIONAL MUD (TX0710005) |
| 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 | 2023-09-19 to 2024-03-26 | UCMR5 Analytical Results: HORIZON REGIONAL MUD (TX0710005) |
| Hexafluoropropylene oxide dimer acid (HFPO-DA) (GenX chemicals) | < 5 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2023-09-19 to 2024-03-26 | UCMR5 Analytical Results: HORIZON REGIONAL MUD (TX0710005) |
| N-ethyl perfluorooctanesulfonamidoacetic acid (NEtFOSAA) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-09-19 to 2024-03-26 | UCMR5 Analytical Results: HORIZON REGIONAL MUD (TX0710005) |
| N-methyl perfluorooctanesulfonamidoacetic acid (NMeFOSAA) | < 6 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-09-19 to 2024-03-26 | UCMR5 Analytical Results: HORIZON REGIONAL MUD (TX0710005) |
| Nonafluoro-3,6-dioxaheptanoic acid (NFDHA) | < 20 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-09-19 to 2024-03-26 | UCMR5 Analytical Results: HORIZON REGIONAL MUD (TX0710005) |
| Perfluoro (2-ethoxyethane) sulfonic acid (PFEESA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-09-19 to 2024-03-26 | UCMR5 Analytical Results: HORIZON REGIONAL MUD (TX0710005) |
| Perfluoro-3-methoxypropanoic acid (PFMPA) | < 4 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-09-19 to 2024-03-26 | UCMR5 Analytical Results: HORIZON REGIONAL MUD (TX0710005) |
| Perfluoro-4-methoxybutanoic acid (PFMBA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-09-19 to 2024-03-26 | UCMR5 Analytical Results: HORIZON REGIONAL MUD (TX0710005) |
| Perfluorobutanesulfonic acid (PFBS) | < 3 ng/L | 2,000 ng/L EPA health advisory (screening, not a legal limit)Screening level, not a legal limit | Not detected above the reporting limit | 2023-09-19 to 2024-03-26 | UCMR5 Analytical Results: HORIZON REGIONAL MUD (TX0710005) |
| Perfluorobutanoic acid (PFBA) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-09-19 to 2024-03-26 | UCMR5 Analytical Results: HORIZON REGIONAL MUD (TX0710005) |
| Perfluorodecanoic acid (PFDA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-09-19 to 2024-03-26 | UCMR5 Analytical Results: HORIZON REGIONAL MUD (TX0710005) |
| Perfluorododecanoic acid (PFDoA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-09-19 to 2024-03-26 | UCMR5 Analytical Results: HORIZON REGIONAL MUD (TX0710005) |
| Perfluoroheptanesulfonic acid (PFHpS) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-09-19 to 2024-03-26 | UCMR5 Analytical Results: HORIZON REGIONAL MUD (TX0710005) |
| Perfluoroheptanoic acid (PFHpA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-09-19 to 2024-03-26 | UCMR5 Analytical Results: HORIZON REGIONAL MUD (TX0710005) |
| Perfluorohexanesulfonic acid (PFHxS) | < 3 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2023-09-19 to 2024-03-26 | UCMR5 Analytical Results: HORIZON REGIONAL MUD (TX0710005) |
| Perfluorohexanoic acid (PFHxA) | < 3 ng/L | 400,000 ng/L Michigan EGLE state MCL (strictest US state) | Not detected above the reporting limit | 2023-09-19 to 2024-03-26 | UCMR5 Analytical Results: HORIZON REGIONAL MUD (TX0710005) |
| Perfluorononanoic acid (PFNA) | < 4 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2023-09-19 to 2024-03-26 | UCMR5 Analytical Results: HORIZON REGIONAL MUD (TX0710005) |
| Perfluorooctanesulfonic acid (PFOS) | < 4 ng/L | 4.0 ng/L federal MCL (2024) | Not detected above the reporting limit | 2023-09-19 to 2024-03-26 | UCMR5 Analytical Results: HORIZON REGIONAL MUD (TX0710005) |
| Perfluorooctanoic acid (PFOA) | < 4 ng/L | 4.0 ng/L federal MCL (2024) | Not detected above the reporting limit | 2023-09-19 to 2024-03-26 | UCMR5 Analytical Results: HORIZON REGIONAL MUD (TX0710005) |
| Perfluoropentanesulfonic acid (PFPeS) | < 4 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-09-19 to 2024-03-26 | UCMR5 Analytical Results: HORIZON REGIONAL MUD (TX0710005) |
| Perfluoropentanoic acid (PFPeA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-09-19 to 2024-03-26 | UCMR5 Analytical Results: HORIZON REGIONAL MUD (TX0710005) |
| Perfluorotetradecanoic acid (PFTA) | < 8 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-09-19 to 2024-03-26 | UCMR5 Analytical Results: HORIZON REGIONAL MUD (TX0710005) |
| Perfluorotridecanoic acid (PFTrDA) | < 7 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-09-19 to 2024-03-26 | UCMR5 Analytical Results: HORIZON REGIONAL MUD (TX0710005) |
| Perfluoroundecanoic acid (PFUnA) | < 2 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-09-19 to 2024-03-26 | UCMR5 Analytical Results: HORIZON REGIONAL MUD (TX0710005) |
11-Chloroeicosafluoro-3-oxaundecane-1-sulfonic acid (11Cl-PF3OUdS)
1H, 1H, 2H, 2H-perfluorodecane sulfonic acid (8:2 FTS)
1H, 1H, 2H, 2H-perfluorohexane sulfonic acid (4:2 FTS)
1H, 1H, 2H, 2H-perfluorooctane sulfonic acid (6:2 FTS)
4,8-Dioxa-3H-perfluorononanoic acid (ADONA)
9-Chlorohexadecafluoro-3-oxanone-1-sulfonic acid (9Cl-PF3ONS)
Hexafluoropropylene oxide dimer acid (HFPO-DA) (GenX chemicals)
N-ethyl perfluorooctanesulfonamidoacetic acid (NEtFOSAA)
N-methyl perfluorooctanesulfonamidoacetic acid (NMeFOSAA)
Nonafluoro-3,6-dioxaheptanoic acid (NFDHA)
Perfluoro (2-ethoxyethane) sulfonic acid (PFEESA)
Perfluoro-3-methoxypropanoic acid (PFMPA)
Perfluoro-4-methoxybutanoic acid (PFMBA)
Perfluorobutanesulfonic acid (PFBS)
Perfluorododecanoic acid (PFDoA)
Perfluoroheptanesulfonic acid (PFHpS)
Perfluoroheptanoic acid (PFHpA)
Perfluorohexanesulfonic acid (PFHxS)
Perfluorohexanoic acid (PFHxA)
Perfluorooctanesulfonic acid (PFOS)
Perfluoropentanesulfonic acid (PFPeS)
Perfluoropentanoic acid (PFPeA)
Perfluorotetradecanoic acid (PFTA)
Perfluorotridecanoic acid (PFTrDA)
Perfluoroundecanoic acid (PFUnA)
Every value is the published result from the cited public record. A reporting limit is the lowest level the method could reliably quantify; a non-detect is not a guarantee of zero.
UCMR5 Analytical Results
UCMR5 Analytical Results: HORIZON REGIONAL MUD (TX0710005)
US EPA
State SDWIS Compliance Record
Lead & Copper Rule 90th-percentile: HORIZON REGIONAL MUD (TX0710005)
US EPA SDWIS
Methodology: how we analyze water. Prepared with AI assistance and reviewed by the PurityMap Editorial Team before publication.
Start with the hot-or-cold tap check. Where Horizon Regional MUD reported something related, it's shown below.
Lead at Horizon Regional MUD: 0.708 µg/L (90th percentile, 2025 monitoring period). Lead has no taste, so a taste neither shows nor rules it out.