Skip to content
TapBuff
ZIP

Cypress Springs SUD N Plant 1 & NE Plant

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

Serves
13,698 people
Connections
4,566
Water source
Surface water
Based in
Mount Vernon, TX
County
Franklin
Owner
Local government
The 7 ZIP codes it serves

75457, 75471, 75478, 75480, 75481, 75487, 75494

The short answer

1 result is above the health goal. The worst: Arsenic, above the health goal. 4 health-based violations since 2016.

What handles it

What was found

PFAS and lithium: EPA UCMR 5, samples taken from Nov. 12, 2024 to Oct. 9, 2025.

Arsenic, haloacetic acids (HAA5), total trihalomethanes (TTHM), nitrate, fluoride and chromium (total): Texas’s own results, samples taken from Feb. 12, 2020 to July 9, 2026, with EPA’s 2012 to 2019 file for earlier years.

Uranium: EPA’s compliance monitoring file, samples taken from March 15, 2017 to March 15, 2017. Newer results are in the utility’s annual water quality report.

PFAS: None of the six PFAS in EPA’s 2024 drinking water rule was found in this utility’s samples. One other PFAS with no federal limit was found, the highest PFPeA at 4.5 ppt: see it below.

EPA’s 2024 PFAS rule, compound by compound

PFASEPA’s limitResult
PFOA4.0 pptNot foundNot found in any of 8 samples, below 4 ppt
PFOS4.0 pptNot foundNot found in any of 8 samples, below 4 ppt
PFHxS10 pptNot foundNot found in any of 8 samples, below 3 ppt
PFNA10 pptNot foundNot found in any of 8 samples, below 4 ppt
HFPO-DA (GenX)10 pptNot foundNot found in any of 8 samples, below 5 ppt
PFBSIndex onlyNot foundNot found in any of 8 samples, below 3 ppt
Hazard IndexPFHxS, PFNA, HFPO-DA and PFBS together1Doesn’t applyDoesn’t apply: no sampling location found two or more of the four
Results from EPA’s UCMR 5 sampling. “Below” is the lab’s reporting level: a result under it reads as not found, which is not the same as zero. The limits are EPA’s 2024 rule, with compliance due from 2029; EPA has since proposed changes to some of them, explained on each compound’s page. PFBS has no limit of its own and counts only toward the Hazard Index, which adds up the four, each against EPA’s health-based level, from each sampling location’s average, as EPA’s UCMR 5 summary does. It counts only where two or more of the four were found, and is above the limit from 1.5.

Above the health goal1

Arsenic

Comes from the source

Above the health goal

1.3ppb

Highest yearly average, 2020 to 2026

2026 average: 0.6 ppb

Averaged by year, the highest was 1.3 ppb, in 2025: below EPA’s legal limit of 10 ppb, but above its health goal of zero. In 2026, the latest year on file, its two samples averaged 0.6 ppb. Earlier, from 2012 to 2019, EPA’s file shows a highest yearly average of 1.2 ppb, in 2015.

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 limits4

Haloacetic acids (HAA5)

Forms or is added in treatment

Below EPA’s limits

23.3ppb

Highest yearly average, 2020 to 2026

2026 average: 21 ppb

Averaged by year, the highest was 23.3 ppb, in 2021, below EPA’s legal limit of 60 ppb. Its highest single sample was 50 ppb. In 2026, the latest year on file, its six samples averaged 21 ppb. Earlier, from 2012 to 2019, EPA’s file shows a highest yearly average of 55 ppb, in 2012, and EPA recorded a violation in 2019.

What handles it

No certification claim covers this compound yet.

Total trihalomethanes (TTHM)

Forms or is added in treatment

Below EPA’s limits

30.5ppb

Highest yearly average, 2020 to 2026

2026 average: 16.3 ppb

Averaged by year, the highest was 30.5 ppb, in 2022, below EPA’s legal limit of 80 ppb. Its highest single sample was 55.9 ppb. In 2026, the latest year on file, its six samples averaged 16.3 ppb. Earlier, from 2012 to 2019, EPA’s file shows a highest yearly average of 65.8 ppb, in 2012, and EPA recorded a violation in 2019.

What handles it

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

Nitrate

Comes from the source

Below EPA’s limits

0.6ppm

Highest sample; found in 14 of 14

2026 average: 0.3 ppm

The highest sample, in 2020, was 0.6 ppm, below EPA’s legal limit of 10 ppm. In 2026, the latest year on file, its two samples averaged 0.3 ppm. Earlier, from 2012 to 2019, EPA’s file shows a highest sample of 0.56 ppm, in 2017.

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

0.087ppm

Highest yearly average, 2020 to 2026

Averaged by year, the highest was 0.087 ppm, in 2026, below EPA’s legal limit of 4.0 ppm. Its highest single sample was 0.091 ppm. That was also the latest year on file. Earlier, from 2012 to 2019, EPA’s file shows a highest yearly average of 0.12 ppm, in 2014.

What handles it

Texas utilities above EPA’s PFAS limits

Also found, with no federal limit

EPA measured these PFAS to learn how often they occur. None has a legal limit or a health goal yet.

CompoundHighest sampleFound inCertification claim
PFPeA4.5 ppt1 of 8None covers it
32 compounds tested and not foundIncluding all six PFAS in EPA’s 2024 rule. Below the reporting level in every sample. Not found is not the same as zero.

From routine monitoring

  • Chromium (total)
  • Lead
  • Uranium

PFAS and lithium, from EPA’s UCMR 5 sampling

  • 11Cl-PF3OUdS
  • 4:2 FTS
  • 6:2 FTS
  • 8:2 FTS
  • 9Cl-PF3ONS
  • ADONA
  • HFPO-DA (GenX)
  • Lithium
  • NEtFOSAA
  • NFDHA
  • NMeFOSAA
  • PFBA
  • PFBS
  • PFDA
  • PFDoA
  • PFEESA
  • PFHpA
  • PFHpS
  • PFHxA
  • PFHxS
  • PFMBA
  • PFMPA
  • PFNA
  • PFOA
  • PFOS
  • PFPeS
  • PFTA
  • PFTrDA
  • PFUnA

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

Disinfectant

Cypress Springs SUD N Plant 1 & NE Plant reported adding chloramine before water enters its pipes, at all 2 of its sampling points, in its 2024 to 2025 sampling for EPA.

Chloramine is chlorine combined with ammonia. It lasts longer in the pipes, and unlike chlorine, it doesn’t leave water that sits out. A filter’s chlorine claim doesn’t cover it: look for the separate chloramine claim under NSF/ANSI 42. No shower filter can carry one: NSF/ANSI 177, the shower filter standard, covers free chlorine only. Fish, turtles and frogs need it removed from their water. This is what the utility reported for that sampling. Its annual water quality report says what it uses now.

Chlorine vs. chloramineFilters with a chloramine claimShower filters, by what their listings cover

Violations since 2016

Contaminant or ruleTypePeriodMeasuredStatus
TTHMThe running average was above the legal limit.EPA: Maximum Contaminant Level Violation, AverageJuly 1, 2019 to Sept. 30, 20190.086 MG/LResolved
TTHMThe running average was above the legal limit.EPA: Maximum Contaminant Level Violation, AverageApril 1, 2019 to June 30, 20190.092 MG/LResolved
Total Haloacetic Acids (HAA5)The running average was above the legal limit.EPA: Maximum Contaminant Level Violation, AverageJan. 1, 2019 to March 31, 20190.061 MG/LResolved
TTHMThe running average was above the legal limit.EPA: Maximum Contaminant Level Violation, AverageJan. 1, 2019 to March 31, 20190.093 MG/LResolved
Health-based violations only. Resolved and archived mean the utility returned to compliance or the state closed the record. 1 monitoring or reporting violation not shown.

What this report can’t tell you

  • Everything else. Arsenic, haloacetic acids (HAA5), total trihalomethanes (TTHM), nitrate, fluoride and chromium (total) results here are Texas’s own from 2020 on, with EPA’s national file for 2012 to 2019. Uranium comes from EPA’s file alone, which ends in 2019. Cypress Springs SUD N Plant 1 & NE Plant’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 samples are from Nov. 12, 2024 to Oct. 9, 2025; Texas’s results run from Feb. 12, 2020 to July 9, 2026; EPA’s compliance samples are from March 15, 2017 to March 15, 2017.

Testing your own tap

Cypress Springs SUD N Plant 1 & NE Plant’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 Texas certifies.

The 3 labs Texas certifies closest to the area Cypress Springs SUD N Plant 1 & NE Plant serves, in a straight line. Call first: certification is test by test, and not every lab takes samples from homeowners.

  • Environmental Monitoring Lab

    Winona, TX · about 47 miles

    Certified for bacteria

    (903) 877-9222

  • Northeast Texas Public Health District Laboratory

    Tyler, TX · about 54 miles

    Certified for bacteria

    (903) 535-0090

  • Southern Petroleum Laboratories (SPL), Inc. (FKA Ana-Lab Corporation)

    Kilgore, TX · about 57 miles

    Certified for bacteria, lead and copper

    (903) 984-0551

Texas Well Owner Network, Texas A&M AgriLife Extension: Well Informed screening events, where well owners bring in water samples to be screened for common contaminants, followed by an hour-long session explaining the results. Upcoming events are on the network's calendar. Trainings, Texas Well Owner Network.

All 80 certified labs for Texas

Sources

PWSID TX0800003. Rebuilt from EPA data on Oct. 18, 2026.

Towns it serves

Also in Franklin County

All Texas utilities

What to do next