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St Martin Water Works District 3 - Cade

What EPA’s and CDC’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
3,249 people
Connections
1,083
Water source
Groundwater
Based in
St. Martinville, LA
County
St. Martin Parish
Owner
Local government
The ZIP code it serves

70560

The short answer

1 result is above the health goal. The worst: Arsenic, above the health goal. 5 health-based violations since 2016.

What handles it

What was found

Nitrate, total trihalomethanes (TTHM) and haloacetic acids (HAA5): Louisiana’s yearly averages per water system, as CDC’s Environmental Public Health Tracking Network publishes them, 2020 to 2022, with EPA’s 2012 to 2019 file for earlier years.

Arsenic, fluoride, chromium (total) and uranium: EPA’s compliance monitoring file, samples taken from March 5, 2012 to Dec. 4, 2017. Newer results are in the utility’s annual water quality report.

Above the health goal1

Arsenic

Comes from the source

Above the health goal

1.4ppb

Highest yearly average, 2012 to 2017

2017 average: 0.97 ppb

Averaged by year, the highest was 1.4 ppb, in 2015: below EPA’s legal limit of 10 ppb, but above its health goal of zero. Its highest single sample was 1.4 ppb. In 2017, the latest year on file, its four samples averaged 0.97 ppb.

What handles it

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

Below EPA’s limits5

Nitrate

Comes from the source

Below EPA’s limits

0.8ppm

Highest yearly average, 2022

Averaged by year, the highest was 0.8 ppm, in 2022, below EPA’s legal limit of 10 ppm. That is the only year on file. Earlier, from 2012 to 2019, EPA’s file shows a highest sample of 2.0 ppm, in 2012.

What handles it

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

Fluoride

Forms or is added in treatment

Below EPA’s limits

0.23ppm

Highest yearly average, 2012 to 2017

2017 average: 0.2 ppm

Averaged by year, the highest was 0.23 ppm, in 2012, below EPA’s legal limit of 4.0 ppm. Its highest single sample was 0.3 ppm. In 2017, the latest year on file, its three samples averaged 0.2 ppm.

What handles it

Total trihalomethanes (TTHM)

Forms or is added in treatment

Below EPA’s limits

4.0ppb

Highest yearly average, 2020 to 2022

Averaged by year, the highest was 4.0 ppb, in 2022, 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 9.3 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

3.8ppb

Highest yearly average, 2012 to 2017

2017: not found

Averaged by year, the highest was 3.8 ppb, in 2015, below EPA’s legal limit of 100 ppb. Its highest single sample was 4.6 ppb. In 2017, the latest year on file, it wasn’t found in any of its three samples.

What handles it

Haloacetic acids (HAA5)

Forms or is added in treatment

Below EPA’s limits

1.9ppb

Highest yearly average, 2020 to 2022

Averaged by year, the highest was 1.9 ppb, in 2022, below EPA’s legal limit of 60 ppb. That was also the latest year on file. Earlier, from 2012 to 2019, EPA’s file shows a highest yearly average of 10.1 ppb, in 2018.

What handles it

No certification claim covers this compound yet.

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

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

    Claim: Arsenic (Pentavalent)<=50 ppb Reduction

    For: Arsenic

    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

Contaminant or ruleTypePeriodMeasuredStatus
Groundwater RuleA significant problem found in a state inspection was not fixed on time.EPA: Failure To Address DeficiencyAug. 28, 2021—Resolved
Groundwater RuleA significant problem found in a state inspection was not fixed on time.EPA: Failure To Address DeficiencyAug. 28, 2021—Resolved
Groundwater RuleA significant problem found in a state inspection was not fixed on time.EPA: Failure To Address DeficiencyAug. 28, 2021—Resolved
Groundwater RuleA significant problem found in a state inspection was not fixed on time.EPA: Failure To Address DeficiencyFeb. 2, 2019—Resolved
Groundwater RuleA significant problem found in a state inspection was not fixed on time.EPA: Failure To Address DeficiencyFeb. 2, 2019—Resolved
Health-based violations only. Resolved and archived mean the utility returned to compliance or the state closed the record. 7 monitoring or reporting violations not shown.

What this report can’t tell you

  • Everything else. Nitrate, total trihalomethanes (TTHM) and haloacetic acids (HAA5) results here are Louisiana’s yearly averages as CDC publishes them, from 2020 on, with EPA’s national file for 2012 to 2019. Arsenic, fluoride, chromium (total) and uranium come from EPA’s file alone, which ends in 2019. St Martin Water Works District 3 - Cade’s own annual report, which it must send you every year, has newer results for those and 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; CDC’s yearly averages for Louisiana cover 2020 to 2022; EPA’s compliance samples are from March 5, 2012 to Dec. 4, 2017.

Testing your own tap

St Martin Water Works District 3 - Cade’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 Louisiana certifies.

The 3 labs Louisiana certifies closest to the area St Martin Water Works District 3 - Cade serves, in a straight line. Call first: certification is test by test, and not every lab takes samples from homeowners.

  • Element Materials Technology Lafayette, LLC

    Lafayette, LA · about 18 miles

    Certified for lead and copper, metals

  • SGS North America, Inc. - Scott

    Scott, LA · about 28 miles

    Certified for nitrate, lead and copper, metals, minerals and other inorganics, organic chemicals, disinfection byproducts

  • LDH Central Laboratory

    Baton Rouge, LA · about 55 miles

    Certified for bacteria

    (225) 219-5200

All 48 certified labs for Louisiana

Sources

PWSID LA1099028. Rebuilt from EPA data on Oct. 18, 2026.

Also in St. Martin Parish

All Louisiana utilities

What to do next