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McArthur/Line 7/sw

What EPA’s and Florida’s records show in this utility’s water: nitrate, arsenic and other regulated chemicals; lead and copper; and violations since 2016, with the certification that handles each result.

Serves
144 people
Connections
36
Water source
Groundwater
Based in
Okeechobee, FL
County
Okeechobee
Owner
Private
The ZIP code it serves

34972

The short answer

2 results are above the health goal. The worst: Lead, above the health goal. No health-based violations on file since 2016.

What handles it

What was found

Lead and copper: EPA SDWIS monitoring periods ending 2000 to 2022.

Uranium, haloacetic acids (HAA5), total trihalomethanes (TTHM), chromium (total), fluoride, arsenic and nitrate: Florida’s own results, samples taken from Sept. 16, 2020 to Aug. 31, 2024, with EPA’s 2012 to 2019 file for earlier years.

Above the health goal2

Lead

Comes from pipes, often your own

Above the health goal

1.5ppb

90th percentile, 2022

In the latest period, 9 in 10 homes sampled were at or below 1.5 ppb, below EPA’s action level of 15 ppb. The action level drops to 10 ppb on Nov. 1, 2027. EPA’s health goal for lead is zero.

What handles it

Uranium

Comes from the source

Above the health goal

0.15ppb

Highest yearly average, 2024

Averaged by year, the highest was 0.15 ppb, in 2024: below EPA’s legal limit of 30 ppb, but above its health goal of zero. That is the only year on file.

What handles it

Below EPA’s limits4

Haloacetic acids (HAA5)

Forms or is added in treatment

Below EPA’s limits

59.4ppb

Highest yearly average, 2020 to 2024

2024: not found

Averaged by year, the highest was 59.4 ppb, in 2020, below EPA’s legal limit of 60 ppb. Its highest single sample was 107 ppb. In 2024, the latest year on file, it wasn’t found in its one sample. EPA recorded no violation for haloacetic acids (HAA5) at this utility since 2020. Earlier, from 2012 to 2019, EPA’s file shows a highest yearly average of 51.4 ppb, in 2017.

What handles it

No certification claim covers this compound yet.

Total trihalomethanes (TTHM)

Forms or is added in treatment

Below EPA’s limits

34.9ppb

Highest yearly average, 2020 to 2024

2024: not found

Averaged by year, the highest was 34.9 ppb, in 2020, below EPA’s legal limit of 80 ppb. Its highest single sample was 47.9 ppb. In 2024, the latest year on file, it wasn’t found in its one sample. Earlier, from 2012 to 2019, EPA’s file shows a highest yearly average of 62.4 ppb, in 2016.

What handles it

  • NSF/ANSI 53 look for “Trihalomethanes (TTHM) Reduction”
  • NSF/ANSI 58 look for “Trihalomethanes (TTHM) Reduction”

Chromium (total)

Comes from the source

Below EPA’s limits

3.6ppb

Highest yearly average, 2021 to 2024

Averaged by year, the highest was 3.6 ppb, in 2024, below EPA’s legal limit of 100 ppb. That was also the latest year on file. Earlier, from 2012 to 2019, EPA’s file shows a highest yearly average of 10 ppb, in 2015.

What handles it

Fluoride

Forms or is added in treatment

Below EPA’s limits

0.12ppm

Highest yearly average, 2021 to 2024

Averaged by year, the highest was 0.12 ppm, in 2024, below EPA’s legal limit of 4.0 ppm. That was also the latest year on file. Earlier, from 2012 to 2019, EPA’s file shows a highest yearly average of 0.1 ppm, in 2015.

What handles it

2 compounds tested and not foundBelow the reporting level in every sample. Not found is not the same as zero.
  • Arsenic
  • Nitrate

What handles it

A certification covers specific claims, not a whole standard. Look for these claims on the certifier’s listing, not the box. Wording varies a little: NSF writes “Lead Reduction,” WQA just “Lead.”

At the tap, or for the whole house?

Lead and copper usually come from pipes and fixtures inside or near your home. A whole-house system sits where water enters, so it cannot catch what your own plumbing adds after it. For those, the filter that counts is the one at the tap. How whole-house systems compare.

Filters with those claims on a certifier’s listing

Disclosure: TapBuff earns a commission if you buy through some links on this page. It does not change which standard or filter we name. As an Amazon Associate, TapBuff earns from qualifying purchases. How TapBuff makes money

Compare five-year costs

The best water filters for lead, ranked

Violations since 2016

No health-based violations on file with EPA since 2016. There are 32 monitoring or reporting violations: a sample missed, late or not reported.

What this report can’t tell you

  • Everything else. Uranium, haloacetic acids (HAA5), total trihalomethanes (TTHM), chromium (total), fluoride, arsenic and nitrate results here are Florida’s own from 2020 on, with EPA’s national file for 2012 to 2019. McArthur/Line 7/sw’s own annual report, which it must send you every year, has the contaminants this page does not show.

  • Your own plumbing. Lead results are the 90th percentile across homes the utility samples. Your home’s service line, solder and fixtures decide yours. A certified lab test is the only way to know.

  • What it means for your health. This page reports what the records show and EPA’s limits and goals; it is not medical advice. If you are worried about a health effect, talk to a doctor or your local health department.

  • Anything after the latest data. SDWIS data is from 2026 Q3; UCMR 5 didn’t sample this utility; Florida’s results run from Sept. 16, 2020 to Aug. 31, 2024.

Testing your own tap

McArthur/Line 7/sw’s results are for the water it sends out. What your own service line, solder and fixtures add shows up only in a test of your tap, by a lab Florida certifies.

The 3 labs Florida certifies closest to the area McArthur/Line 7/sw serves, in a straight line. Call first: certification is test by test, and not every lab takes samples from homeowners.

  • Florida-Spectrum Environmental Services-Big Lake Laboratory

    Okeechobee, FL · under a mile

    Certified for bacteria

    (863) 763-3336

  • FL Dept. of Health - Indian River County Health Department

    Vero Beach, FL · about 34 miles

    Certified for bacteria

    (772) 794-7400

  • Eurofins Port St. Lucie

    Port St. Lucie, FL · about 35 miles

    Certified for bacteria

    (772) 343-8006

Florida Department of Health Bureau of Public Health Laboratories: Coliform and E. coli testing for private wells at the Jacksonville and Miami labs. Collection kits come from your county health department, and the sample has to reach the lab on ice the same day it is collected. $40 for private testing through the state lab. Well Water Testing, Florida Department of Health.

All 212 certified labs for Florida

Sources

PWSID FL4474474. Rebuilt from EPA data on Oct. 18, 2026.

Towns it serves

Also in Okeechobee County

All Florida utilities

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