Water system
Mount Pleasant
EPA ID OH4101712 · Jefferson County · 450 people served · owned by a local government
Mount Pleasant treats its own water from Groundwater wells (1 wells).
The system's record
- Active wells
- 1
- Serves
- 450 people · Jefferson County
- EPA ID
- OH4101712
About this area's water
Did you know
- Mount Pleasant, settled in 1803, was a nationally significant Quaker settlement and hub of early Ohio abolitionism.
- In 1817, Charles Osborn founded The Philanthropist there -- reputed to be the first U.S. newspaper advocating abolition of slavery; Benjamin Lundy began publishing The Genius of Universal Emancipation in the village in…
- Federal SDWIS compliance records show 2020 Lead and Copper Rule violations for Mount Pleasant's water system.
Source: en.wikipedia.org
History5
- 1803Settled by Quaker families (including Nathan Updegraff); became a nationally significant center of early Ohio abolitionism.
- 1817Quaker Charles Osborn founded The Philanthropist in Mount Pleasant, considered the first U.S. newspaper to advocate abolition of slavery.
- 1821Benjamin Lundy began publishing The Genius of Universal Emancipation in Mount Pleasant.
- 1850Village population reached its historical peak of 755 residents.
- 2020Federal records show two health-based violations under the Lead and Copper Rule, opened June-Aug. 2020 and resolved by May-Aug. 2021: a corrosion control study or recommendation not done, and public education about lead not carried out.
Source: en.wikipedia.orgdata.epa.gov
Treatment & pressure
How it is treated
Mount Pleasant treats its own water from a single groundwater well (Ohio EPA SDWIS); we found no published CCR describing its treatment. Federal compliance records add a documented health-based Treatment Technique violation under the Total…
Source: data.epa.govdata.epa.govdata.epa.gov
Water pressure
Not published.
Source: data.epa.gov
What it costs
No rate schedule, ordinance, or water-department contact information was found published online for this small Jefferson County community.
Water quality & impurities
EPA compliance record
Lead at the tap: 90th-percentile result 1.5 ppb in 2025 (action level 15 ppb).
EPA health-based violations since 2015:
- 2020Lead and Copper Rule · corrosion control study or recommendation not done; public education about lead not carried out · returned to compliance
EPA's count of 2 includes 1 repeat quarterly violation of the problems listed.
7 violations of any kind logged since 2020: 2 for required testing that was missed or reported late; 3 for a report, record or notice that was missing, late or incomplete (the yearly water quality report, a public notice, lead line records); 2 health-based.
Supply stress
Not established from public sources; no drought, aquifer-depletion, or capacity data specific to Mount Pleasant's single-well system was found. Small-system capacity risk is plausible given the documented 2020 Lead and Copper Rule violations (a corrosion control study and public education about lead), but nothing further is confirmed.
Source: data.epa.gov
Sewers
Sanitary
Not determined from available public sources whether Mount Pleasant has a municipal sanitary sewer or relies on septic systems.
Storm
Not determined from available public sources.
Sourcesverified
Compiled from the utility's own reports and public records, then independently re-checked against primary sources. Little is published about this system, so details are thin.
Main supplier in 1 ZIP code
Serves
Main water supplier in 1 ZIP code
- 43939 · Mount Pleasant79% of residents
Also present in 1 more ZIP code
- 43917 · Smithfield Township and Dillonvale4% of residents
Population-weighted resident shares; a ZIP code can have more than one system on record. Recomputed from each ZIP's own system list, not from the map's cached footprint.
Buys from · Sells to
Mount Pleasant does not buy water from another system on record; it treats its own source water.
No other system is on record buying water from Mount Pleasant.
What the records show about Mount Pleasant
Who runs it
EPA's record describes Mount Pleasant as owned by a local government. It has 260 service connections and serves 450 people.
EPA classes it as a community water system, one that serves the same residents all year.
Source: EPA Safe Drinking Water Information System (SDWIS), water system record.
How the water is treated
EPA's treatment table registers these steps for Mount Pleasant: chlorine disinfection.
The list is what each system registered with EPA for treatment plants EPA still shows as active, and it can lag a plant upgrade.
Source: EPA Safe Drinking Water Information System (SDWIS) treatment table (EPA Envirofacts, pulled September 2026).
Violations
EPA counts 2 health-based violations for Mount Pleasant since 2015. Health-based means a contaminant above its legal limit or a required treatment step not carried out. They fall into 1 separate problem (one contaminant or rule in one year); the table lists it.
EPA logs a violation for each compliance period a problem lasts, so the count of 2 includes 1 repeat entry of the problems listed.
EPA logs 7 violations of any kind since 2020: 2 for required testing that was missed or reported late; 3 for a report, record or notice that was missing, late or incomplete (the yearly water quality report, a public notice, lead line records); 2 health-based.
| Year | Contaminant or rule | Kind | Measured | Limit | Status in EPA's record |
|---|---|---|---|---|---|
| 2020 | Lead and Copper Rule | corrosion control study or recommendation not done; public education about lead not carried out | not on file | not on file | returned to compliance |
Source: EPA Safe Drinking Water Information System (SDWIS) violation records: health-based violations with compliance periods beginning in 2015 or later, all violations from 2020 or later (EPA Envirofacts, pulled September 2026).
Lead and copper at the tap
In the sampling period ending December 2025, the 90th-percentile lead result at Mount Pleasant was 1.5 ppb, under both the current 15 ppb action level and the 10 ppb level that applies from 2027.
The highest result on file is 19.4 ppb, in the period ending December 2020.
EPA has 13 sampling periods on file for Mount Pleasant since 2016, the first ending in 2018; 1 of the 13 periods went above 15 ppb, and 1 above 10 ppb.
Every water system has to inventory its service lines, the pipes from the main to each building. In the inventory Mount Pleasant sent EPA, 292 lines are counted.
| Material | Lines |
|---|---|
| Lead | 0 |
| Galvanized, needing replacement | 0 |
| Unknown material | 0 |
| Not lead | 292 |
| All lines | 292 |
Systems sample taps in the homes most likely to have lead pipes or solder. The 90th-percentile result is the level nine in ten of the sampled homes were at or below. Lead comes mostly from service lines and house plumbing, not the source water, so a low result for the system does not clear an old house.
EPA's dashboard status for this inventory: reported all required service line types.
Source: EPA Safe Drinking Water Information System (SDWIS) lead and copper 90th-percentile results (EPA Envirofacts), sampling periods ending 2016 or later; EPA's service line inventory dashboard, Ohio's 2026 Q2 submission.
PFAS
Ohio EPA's own statewide sampling tested 1 plant of Mount Pleasant (latest sample July 2020). Not one of the six PFAS tested (PFOA, PFOS, PFHxS, PFNA, GenX and PFBS) was detected.
PFAS are the 'forever chemicals' from firefighting foam, plating shops and non-stick coatings. Results are for water leaving the plant, not your tap.
Source: EPA UCMR 5 occurrence data (final release, August 2026); Ohio EPA statewide PFAS sampling, 2019 to 2021, and its sampling status map.
Disinfection byproducts
Chlorine that disinfects water also reacts with organic matter to form byproducts. Two groups have federal limits: total trihalomethanes (TTHM, 80 µg/L) and five haloacetic acids (HAA5, 60 µg/L), judged on running yearly averages at each sampling site.
For TTHM, the average of Mount Pleasant's samples in 2019, the last year it was sampled, was 11.8 µg/L. The worst yearly average was 33.5 µg/L and the highest single sample was 47.3 µg/L, from 13 samples taken from 2013 to 2019.
For HAA5, the average in the last year sampled was 0 µg/L. The worst yearly average was 4.5 µg/L and the highest single sample was 8.9 µg/L, from 13 samples.
| Byproduct | Limit | Latest yearly average | Worst yearly average | Highest sample | Samples |
|---|---|---|---|---|---|
| TTHM | 80 µg/L | 11.8 µg/L (2019) | 33.5 µg/L | 47.3 µg/L | 13 |
| HAA5 | 60 µg/L | 0 µg/L | 4.5 µg/L | 8.9 µg/L | 13 |
A yearly average of 0 means nothing was detected in that year's samples. EPA's file stops at 2019; Ohio EPA's Drinking Water Watch has newer results.
Source: EPA Six-Year Review 4 compliance monitoring data, 2012 to 2019, distribution-system samples (non-detects counted as zero).
Nitrate, arsenic and radioactivity
Nitrate: the highest of 9 samples was 0.95 mg/L (as nitrogen) in 2018; in 2019, the last year sampled, the highest was 0.86 mg/L. No sample was over the limit of 10 mg/L. Nitrate above 10 is unsafe for infants.
Arsenic: the highest of 3 samples was 7.2 µg/L (limit 10); detections averaged 7.2; none over the limit.
| Contaminant | Samples | Highest result | Limit | Samples over limit |
|---|---|---|---|---|
| Nitrate (as nitrogen) | 9 | 0.95 mg/L | 10 mg/L | 0 |
| Arsenic | 3 | 7.2 µg/L | 10 µg/L | 0 |
Measured in finished water: at the plant's entry points and in the distribution system; raw well and intake samples are left out. Non-detects count as zero.
Source: EPA Six-Year Review 4 compliance monitoring data, 2012 to 2019, finished water.
Solvents and fuels
EPA's file holds results for all six solvent and fuel compounds it checked. Benzene, carbon tetrachloride, 1,2-dichloroethane, trichloroethylene, tetrachloroethylene, and vinyl chloride were not detected in 3 samples each.
| Compound | Limit | Samples | Detected in | Highest result | Samples over limit |
|---|---|---|---|---|---|
| Benzene | 5 µg/L | 3 | 0 of 3 | not detected | 0 |
| Carbon tetrachloride | 5 µg/L | 3 | 0 of 3 | not detected | 0 |
| 1,2-dichloroethane | 5 µg/L | 3 | 0 of 3 | not detected | 0 |
| Trichloroethylene (TCE) | 5 µg/L | 3 | 0 of 3 | not detected | 0 |
| Tetrachloroethylene (PCE) | 5 µg/L | 3 | 0 of 3 | not detected | 0 |
| Vinyl chloride | 2 µg/L | 3 | 0 of 3 | not detected | 0 |
"Not detected" means the lab's result was below what its method can measure, not that the compound is absent. Non-detects count as zero in the highest-result column.
Source: EPA Six-Year Review 4 compliance monitoring data, 2012 to 2019, finished water.
Farm chemicals and metals
EPA's file holds results for 8 of the nine herbicides and metals it checked. Detected: selenium in 1 of 3 samples, highest 6.6 µg/L (limit 50). Not detected: atrazine, alachlor, chromium, cadmium, barium, mercury, and thallium, in 3 samples each.
| Substance | Kind | Limit | Samples | Detected in | Highest result | Samples over limit |
|---|---|---|---|---|---|---|
| Atrazine | Farm chemical | 3 µg/L | 3 | 0 of 3 | not detected | 0 |
| Alachlor | Farm chemical | 2 µg/L | 3 | 0 of 3 | not detected | 0 |
| Chromium | Metal | 100 µg/L | 3 | 0 of 3 | not detected | 0 |
| Cadmium | Metal | 5 µg/L | 3 | 0 of 3 | not detected | 0 |
| Barium | Metal | 2,000 µg/L | 3 | 0 of 3 | not detected | 0 |
| Mercury | Metal | 2 µg/L | 3 | 0 of 3 | not detected | 0 |
| Selenium | Metal | 50 µg/L | 3 | 1 of 3 | 6.6 µg/L | 0 |
| Thallium | Metal | 2 µg/L | 3 | 0 of 3 | not detected | 0 |
Non-detects count as zero in the highest-result column.
Source: EPA Six-Year Review 4 compliance monitoring data, 2012 to 2019, finished water.
Bacteria in the pipes
From 2012 to 2019, 0 of 97 routine total coliform samples taken in the distribution system at Mount Pleasant tested positive (0%); in 2019, the last year on file, 0 of 12 did.
A positive coliform test is a warning sign, not a violation by itself. E. coli is a sign that human or animal waste may have reached the water. Coliform counts are routine samples only; E. coli counts include repeat samples.
Source: EPA Six-Year Review 4 compliance monitoring data, 2012 to 2019, distribution-system presence/absence tests for total coliform and E. coli.
Fluoride
The Ohio Department of Health's report to the CDC (My Water's Fluoride) says Mount Pleasant has fluoride from natural sources, but at a level below what is recommended for preventing tooth decay, and does not adjust it. The level it reports is 0.2 mg/L.
EPA's treatment table lists no fluoridation step at Mount Pleasant.
Measured fluoride: none was detected in 3 samples at the plant's entry points in 2012 to 2019.
The recommended level for preventing tooth decay is 0.7 mg/L; the federal limit is 4 mg/L. The treatment list is what each system registered with EPA and can lag a plant upgrade.
Source: CDC My Water's Fluoride (fluoridation status as reported by the Ohio Department of Health, fetched September 2026); EPA Safe Drinking Water Information System (SDWIS) treatment table; EPA Six-Year Review 4 compliance monitoring data, 2012 to 2019, entry-point fluoride samples.
How well the service area is mapped
EPA estimated the service area of Mount Pleasant with a computer model rather than drawing it from the utility's map, so its edges are approximate.
Source: EPA Service Area Boundaries; resident estimate by this atlas from ZIP-code overlap.
Photograph
On the map
Show this system's territory on the map — 2 ZIP codes in all.
Sources
U.S. EPA SDWIS and Community Water System Service Area Boundaries (v3, 2026), Ohio EPA primacy data, 2020 census blocks: the system serving most residents, traced through purchases to the treating utility; Ohio EPA 2023 Sewer and Water Rate Survey (Ohio State, May 2025) for household bills; Ohio EPA DEFA loan awards since 2016 for the loans paragraph · EPA SDWIS · EPA service area boundaries · Ohio EPA drinking water · Ohio EPA rate survey
EPA's own record for this system: Enforcement and Compliance History report for OH4101712 (EPA ECHO).
Notable facts: en.wikipedia.org
History: en.wikipedia.org, data.epa.gov
Water pressure: data.epa.gov
Treatment: data.epa.gov, data.epa.gov, data.epa.gov
Supply stress: data.epa.gov
