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Black Dairy Road Tp

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
80 people
Connections
26
Water source
Groundwater
Based in
Seffner, FL
County
Hillsborough
Owner
Private

The short answer

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

What handles it

What was found

Arsenic, uranium, nitrate, haloacetic acids (HAA5), total trihalomethanes (TTHM), chromium (total) and fluoride: Florida’s own results, samples taken from Oct. 6, 2020 to Dec. 12, 2024, with EPA’s 2012 to 2019 file for earlier years.

Above the health goal2

Arsenic

Comes from the source

Above the health goal

0.3ppb

Highest yearly average, 2021 to 2024

Averaged by year, the highest was 0.3 ppb, in 2024: below EPA’s legal limit of 10 ppb, but above its health goal of zero. Its highest single sample was 0.6 ppb. That was also the latest year on file. Earlier, from 2012 to 2019, EPA’s file shows a highest yearly average of 0.55 ppb, in 2012.

What handles it

  • NSF/ANSI 58 look for “Arsenic (Pentavalent)<=50 ppb Reduction”
  • NSF/ANSI 53 look for “Arsenic (Pentavalent)<=50 ppb Reduction”

Uranium

Comes from the source

Above the health goal

0.4ppb

Highest yearly average, 2024

Averaged by year, the highest was 0.4 ppb, in 2024: below EPA’s legal limit of 30 ppb, but above its health goal of zero. Its highest single sample was 0.46 ppb. That is the only year on file.

What handles it

Below EPA’s limits5

Nitrate

Comes from the source

Below EPA’s limits

6.0ppm

Highest sample; found in 8 of 10

2024 average: 1.4 ppm

The highest sample, in 2021, was 6.0 ppm, below EPA’s legal limit of 10 ppm. In 2024, the latest year on file, its two samples averaged 1.4 ppm. Earlier, from 2012 to 2019, EPA’s file shows a highest sample of 3.8 ppm, in 2017.

What handles it

  • NSF/ANSI 58 look for “Nitrate/Nitrite Reduction”
  • NSF/ANSI 53 look for “Nitrate/Nitrite (30 ppm challenge)”

Haloacetic acids (HAA5)

Forms or is added in treatment

Below EPA’s limits

32.2ppb

Highest yearly average, 2021 to 2024

2024, one sample: 13.9 ppb

Averaged by year, the highest was 32.2 ppb, in 2021, below EPA’s legal limit of 60 ppb. In 2024, the latest year on file, its one sample was 13.9 ppb. Earlier, from 2012 to 2019, EPA’s file shows a highest yearly average of 32.5 ppb, in 2014.

What handles it

No certification claim covers this compound yet.

Total trihalomethanes (TTHM)

Forms or is added in treatment

Below EPA’s limits

26.6ppb

Highest yearly average, 2021 to 2024

Averaged by year, the highest was 26.6 ppb, in 2024, below EPA’s legal limit of 80 ppb. That was also the latest year on file. Earlier, from 2012 to 2019, EPA’s file shows a highest yearly average of 39.6 ppb, in 2015.

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

2.0ppb

Highest yearly average, 2021 to 2024

2024: not found

Averaged by year, the highest was 2.0 ppb, in 2021, below EPA’s legal limit of 100 ppb. Its highest single sample was 3.0 ppb. In 2024, the latest year on file, it wasn’t found in any of its two samples. Earlier, from 2012 to 2019, EPA’s file shows a highest yearly average of 0.6 ppb, in 2018.

What handles it

Fluoride

Forms or is added in treatment

Below EPA’s limits

0.025ppm

Highest yearly average, 2021 to 2024

2024: not found

Averaged by year, the highest was 0.025 ppm, in 2021, below EPA’s legal limit of 4.0 ppm. Its highest single sample was 0.1 ppm. In 2024, the latest year on file, it wasn’t found in any of its four samples. Earlier, from 2012 to 2019, EPA’s file shows a highest yearly average of 0.16 ppm, in 2015.

What handles it

One compound tested and not foundBelow the reporting level in every sample. Not found is not the same as zero.
  • Lead

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.”

  • NSF/ANSI 53

    Claim: Arsenic (Pentavalent)<=50 ppb Reduction

    For: Arsenic

    Other certifiers’ wording: Arsenic (III) (50 ppb influent level)

  • NSF/ANSI 58

    Claims: Arsenic (Pentavalent)<=50 ppb Reduction, Uranium

    For: Arsenic, Uranium

    Other certifiers’ wording: Arsenic (Pentavalent)<=300 ppb Reduction; Arsenic (V) (300 ppb influent level)

At the tap, or for the whole house?

These come with the water itself, so a whole-house system certified for the same claims treats every tap and shower. A filter at the tap treats drinking water for much less. 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 reverse osmosis systems, ranked

Violations since 2016

No health-based violations on file with EPA since 2016. There is 1 monitoring or reporting violation: a sample missed, late or not reported.

What this report can’t tell you

  • Everything else. Arsenic, uranium, nitrate, haloacetic acids (HAA5), total trihalomethanes (TTHM), chromium (total) and fluoride results here are Florida’s own from 2020 on, with EPA’s national file for 2012 to 2019. Black Dairy Road Tp’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 Oct. 6, 2020 to Dec. 12, 2024.

Testing your own tap

Black Dairy Road Tp’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.

No lab Florida certifies is within 75 miles of the area Black Dairy Road Tp serves on the state’s list. Some take samples by mail; the state’s page lists them all.

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 FL6291445. Rebuilt from EPA data on Oct. 18, 2026.

Towns it serves

Also in Hillsborough County

All Florida utilities

What to do next