MT. Pleasant
What EPA’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
- 10,198 people
- Connections
- 296
- Water source
- Groundwater
- Based in
- MT. Pleasant, MI
- Owner
- Native American
The short answer
Nothing in EPA’s records for this utility is above a health goal. That covers PFAS and lithium; nitrate, arsenic and other regulated chemicals; and lead and copper, not everything. No health-based violations on file since 2016.
What was found
PFAS and lithium: EPA UCMR 5, samples taken from March 12, 2025 to Oct. 28, 2025.
Total trihalomethanes (TTHM), fluoride, haloacetic acids (HAA5), nitrate, arsenic, chromium (total) and uranium: EPA’s compliance monitoring file, samples taken from July 17, 2012 to Aug. 6, 2019. 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. None of the other 23 PFAS tested for was found either.
EPA’s 2024 PFAS rule, compound by compound
| PFAS | EPA’s limit | Result |
|---|---|---|
| PFOA | 4.0 ppt | Not foundNot found in any of 2 samples, below 4 ppt |
| PFOS | 4.0 ppt | Not foundNot found in any of 2 samples, below 4 ppt |
| PFHxS | 10 ppt | Not foundNot found in any of 2 samples, below 3 ppt |
| PFNA | 10 ppt | Not foundNot found in any of 2 samples, below 4 ppt |
| HFPO-DA (GenX) | 10 ppt | Not foundNot found in any of 2 samples, below 5 ppt |
| PFBS | Index only | Not foundNot found in any of 2 samples, below 3 ppt |
| Hazard IndexPFHxS, PFNA, HFPO-DA and PFBS together | 1 | Doesn’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. | ||
Below EPA’s limits5
Lithium
Comes from the source
10.8ppb
Highest sample, Sept. 22, 2025; found in 2 of 2
The highest sample was 10.8 ppb. As EPA rounds results, that is at EPA’s health reference level of 10 ppb, not above it: EPA counts a result as above it from 15 ppb.
What handles it
No certification claim covers this compound yet.
Total trihalomethanes (TTHM)
Forms or is added in treatment
37.5ppb
Highest yearly average, 2012 to 2019
2019 average: 12.3 ppb
Averaged by year, the highest was 37.5 ppb, in 2018, below EPA’s legal limit of 80 ppb. Its highest single sample was 57 ppb. In 2019, the latest year on file, its two samples averaged 12.3 ppb.
What handles it
- NSF/ANSI 53 look for “Trihalomethanes (TTHM) Reduction”
- NSF/ANSI 58 look for “Trihalomethanes (TTHM) Reduction”
Fluoride
Forms or is added in treatment
0.97ppm
Highest yearly average, 2012 to 2017
2017: not found
Averaged by year, the highest was 0.97 ppm, in 2013, below EPA’s legal limit of 4.0 ppm. In 2017, the latest year on file, it wasn’t found in its one sample.
What handles it
- NSF/ANSI 58 look for “Fluoride Reduction”
- NSF/ANSI 53 look for “Fluoride”
Haloacetic acids (HAA5)
Forms or is added in treatment
7.0ppb
Highest yearly average, 2012 to 2019
Averaged by year, the highest was 7.0 ppb, in 2019, below EPA’s legal limit of 60 ppb. Its highest single sample was 12 ppb. That was also the latest year on file.
What handles it
No certification claim covers this compound yet.
Nitrate
Comes from the source
0.066ppm
Highest sample; found in 1 of 10
2018, one sample: 0.066 ppm
The highest sample, in 2018, was 0.066 ppm, below EPA’s legal limit of 10 ppm. That was also the latest year on file, and its one sample was 0.066 ppm.
What handles it
- NSF/ANSI 58 look for “Nitrate/Nitrite Reduction”
- NSF/ANSI 53 look for “Nitrate/Nitrite (30 ppm challenge)”
33 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
- Arsenic
- 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)
- NEtFOSAA
- NFDHA
- NMeFOSAA
- PFBA
- PFBS
- PFDA
- PFDoA
- PFEESA
- PFHpA
- PFHpS
- PFHxA
- PFHxS
- PFMBA
- PFMPA
- PFNA
- PFOA
- PFOS
- PFPeA
- PFPeS
- PFTA
- PFTrDA
- PFUnA
Disinfectant
MT. Pleasant reported disinfecting with chlorine, not chloramine, at its one sampling point, in its 2025 sampling for EPA.
Chlorine leaves water that sits out for a few days, CDC says. A filter certified for it carries a chlorine claim under NSF/ANSI 42; a shower filter, a free chlorine claim under NSF/ANSI 177. This is what the utility reported for that sampling. Its annual water quality report says what it uses now.
Violations since 2016
No health-based violations on file with EPA since 2016. There are 17 monitoring or reporting violations: a sample missed, late or not reported.
What this report can’t tell you
Newer results, and everything else. Michigan sent EPA no routine results for its 2012 to 2019 review, so this page has no routine nitrate, arsenic or disinfection byproduct results for MT. Pleasant. They are in its own annual report, which it must send you every year.
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 March 12, 2025 to Oct. 28, 2025; EPA’s compliance samples are from July 17, 2012 to Aug. 6, 2019.
Testing your own tap
The 3 labs Michigan certifies closest to the area MT. Pleasant serves, in a straight line. Call first: certification is test by test, and not every lab takes samples from homeowners.
Northwest Michigan Community Health Agency
Gaylord, MI · about 4 miles
Certified for bacteria, nitrate, minerals and other inorganics
Raven Analytical Laboratory
Roscommon, MI · about 36 miles
Certified for bacteria, nitrate
Grand Traverse Analytical, LLC
Traverse City, MI · about 44 miles
Certified for bacteria, nitrate, lead and copper, metals
Sources
- EPA UCMR 5 occurrence data, file of Oct. 15, 2026
- EPA SDWA bulk download (SDWIS federal data), 2026 Q3
- EPA Six-Year Review 4 compliance monitoring data, 2012 to 2019, file of Feb. 5, 2024
- Disinfectant: EPA UCMR 5 occurrence data, additional data elements, file of Oct. 15, 2026
- Certified labs: EGLE, State of Michigan certified drinking water laboratories, read Oct. 16, 2026; distances from the Census 2020 ZIP code tabulation area gazetteer
- Limits and goals: each contaminant’s page, with its EPA source.
- How this page is built: methodology.
PWSID 055293201. Rebuilt from EPA data on Oct. 18, 2026.
What to do next
- Nothing here is above a health goalIn EPA’s records for this utility. They don’t cover everything, which is why the next step matters.Every contaminant TapBuff tracks
- Get the utility’s own reportMT. Pleasant must send you a water quality report every year. It has newer results than EPA’s national file, which ends in 2019.How to read it
- Test your own tap for leadYour service line, solder and fixtures decide the lead at your faucet, not the utility’s average.Lead in your water: what to do
- Decide if you want a filter at allA filter for taste or chlorine is a preference, not a need. The standards say what each kind can do.NSF/ANSI standards, decoded