Water system
New Carlisle City
EPA ID OH1203312 · Clark County · 5,800 people served · owned by a local government
New Carlisle City treats its own water from Groundwater wells (4 wells).
The system's record
- Active wells
- 4
- Serves
- 5,800 people · Clark County
- EPA ID
- OH1203312
About this area's water
Did you know
- New Carlisle's drinking water comes from a wellfield whose surface footprint is a shopping center and Main Street, but whose underground recharge area extends several miles north — the city has posted signs marking the…
- Gangster John Dillinger's very first bank robbery, on June 21, 1933, hit the New Carlisle National Bank for about $10,000. The building still stands at Main and Jefferson.
- The city tested its finished water for radon exactly once, in 2011, finding 2.36 pCi/L. Radon in tap water is not a federally regulated contaminant, and the test has not been repeated.
- The wastewater plant serves more than just New Carlisle — North Hampton and the Northwestern Local Schools are on the same 1.0 mgd system.
History6
- 1810Settlement laid out under the name Monroe; later renamed for Carlisle, Pennsylvania, birthplace of some of the first settlers. Incorporated as a village in 1831.
- 1933John Dillinger committed his first bank robbery at the New Carlisle National Bank on June 21, taking about $10,000. The building still stands at Main and Jefferson streets.
- 1973New Carlisle elevated from village to city status.
- 1991-1999Compliance sampling found detectable 1,1,1-trichloroethane in raw well water on nine occasions, at 0.6 to 1.6 ug/L — well below the 200 ug/L MCL, but evidence of a pathway from the surface into the…
- 1993 onwardNitrate exceeded Ohio EPA's 2 mg/L concentration of concern on 17 occasions in raw and treated water, ranging 2.13 to 4.6 mg/L, all below the 10 mg/L MCL.
- 2020Wells sampled under Ohio's statewide PFAS initiative; PFAS detected below the Ohio EPA action level. The system also took part in the UCMR5 round.
Treatment & pressure
How it is treated
Groundwater from deep wells (SDWIS lists four) drawing on a sand-and-gravel aquifer in a glacier-scoured buried valley. The wellfield sits north and east of the Water Treatment Plant at 434 N. Main Street, bounded at the surface by a shopping center, Main Street, and commercial and residential…
Source: newcarlisleohio.govnewcarlisleohio.gov
Water pressure
Not published. The system is fed by the 1.7-million-gallon Scarff Road elevated tower, but no psi figure or pressure-zone information appears in city materials.
Source: newcarlisleohio.gov
What it costs
Not published online. Confirmed absent from the Public Services water page, the Finance Department page, and the Finance Department's own Water/Sewer page, which covers…
Water quality & impurities10
| Contaminant | Level | Limit | Year |
|---|---|---|---|
| Nitrate (as nitrogen) Below the MCL but above Ohio EPA's 2 mg/L concentration of concern, consistent with the aquifer's documented nitrate… | 2.30 ppm | 10 (MCL) | 2025 |
| Total Trihalomethanes (TTHM) Chlorination byproduct; range 12.6-40.1 ppb from 2 samples collected. | 40.1 ppb | 80 (MCL) | 2025 |
| Total chlorine residual Running annual average (CCR prints 1.046667); range 0.72-1.20 ppm. | 1.05 ppm | 4 (MRDL) | 2025 |
| Lead (90th percentile) 0 of 20 samples exceeded the lead action level. | 0 ppb | 15 (action… | 2025 |
| Copper (90th percentile) Flagged as a probable CCR error rather than a result. The 2025 CCR prints 1.3 in the 90th-percentile column — exactly… | not reliably… ppm | 1.3 (action… | 2025 |
| Barium Range 0.400-0.400 ppm. | 0.400 ppm | 2 (MCL) | 2023 |
| Fluoride Range 0.264-0.264 ppm. Low enough to suggest the system does not actively fluoridate. | 0.264 ppm | 4 (MCL) | 2020 |
| Gross alpha Naturally occurring radioactivity from erosion of deposits. | 2.85 pCi/L | 15 (MCL) | 2023 |
| PFAS (sum) Statewide PFAS Sampling Initiative; follow-up monitoring ongoing. The CCR does not state which Ohio EPA action level… | 6.1 ppt | below Ohio EPA… | 2020 |
| PFBS Range 0.0043-0.0055 ppb. | 0.0049 ppb | unregulated | 2023 |
Source: newcarlisleohio.gov
EPA compliance record
Lead at the tap: 90th-percentile result 0 ppb in 2025 (action level 15 ppb).
EPA record: no health-based violations since 2015.
3 violations of any kind logged since 2020: 1 for required testing that was missed or reported late; 2 for a report, record or notice that was missing, late or incomplete (the yearly water quality report, a public notice, lead line records).
Projects & plans1
Planned or needed
- Ground Water Source Protection Program completion · planned
The 2025 CCR states the city is currently working to complete its Ground Water Source Protection Program, prompted by the aquifer's high susceptibility rating.…
Source: newcarlisleohio.gov
Supply stress
Ohio EPA rates the aquifer highly susceptible to contamination, and the CCR gives three specific reasons: detected volatile organic compounds and elevated nitrate imply a pathway from the ground surface into the aquifer; discontinuous clay layers within the aquifer offer little to no protection against contaminant transport from the…
Source: newcarlisleohio.gov
Sewers
Sanitary
City-owned wastewater treatment plant rated 1.0 mgd using aerobic digestion with clarifiers and filtration, running about 500,000 gallons per day. It serves New Carlisle plus nearby residential developments, mobile home parks, North Hampton, and Northwestern Local Schools via roughly 35 miles of sewer and 200 manholes. The city files an…
Storm
Not detailed in published city materials; no separate stormwater utility or fee identified.
Source: newcarlisleohio.gov
Sourcesverified
Compiled from the utility's own reports and public records, then independently re-checked against primary sources.
Main supplier in 1 ZIP code
Serves
Main water supplier in 1 ZIP code
- 45344 · Bethel Township and New Carlisle31% 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
New Carlisle City does not buy water from another system on record; it treats its own source water.
No other system is on record buying water from New Carlisle City.
What the records show about New Carlisle City
Who runs it
EPA's record describes New Carlisle City as owned by a local government. It has 2,283 service connections and serves 5,800 people.
EPA classes it as a community water system, one that serves the same residents all year.
EPA's record says it has substantially implemented source water protection under Ohio's program, dating the program from 2025. Its office telephone on EPA's record is 937-604-2101.
Source: EPA Safe Drinking Water Information System (SDWIS), water system record.
How the water is treated
EPA's treatment table registers these steps for New Carlisle City: aeration, corrosion control, chlorine disinfection, iron and manganese removal, ion-exchange softening, and sand or media filtration.
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's record shows no health-based violations for New Carlisle City since 2015.
EPA logs 3 violations of any kind since 2020: 1 for required testing that was missed or reported late; 2 for a report, record or notice that was missing, late or incomplete (the yearly water quality report, a public notice, lead line records).
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 New Carlisle City was 0 ppb, under both the current 15 ppb action level and the 10 ppb level that applies from 2027. A result of 0 means at least nine in ten of the homes sampled had no lead detected.
The highest result on file is 5.5 ppb, in the period ending December 2023.
EPA has 9 sampling periods on file for New Carlisle City since 2016, the first ending in 2017; no period was above 10 ppb.
Every water system has to inventory its service lines, the pipes from the main to each building. In the inventory New Carlisle City sent EPA, 2,440 lines are counted.
| Material | Lines |
|---|---|
| Lead | 0 |
| Galvanized, needing replacement | 0 |
| Unknown material | 1,219 |
| Not lead | 1,221 |
| All lines | 2,440 |
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
EPA's fifth national round of testing (UCMR 5) took 2 samples of the water entering the pipes of New Carlisle City in 2023 and measured 29 PFAS.
PFOA and PFOS were not detected, against a federal limit of 4 ng/L each.
The highest PFAS result was PFBS 5.5 ng/L.
Ohio EPA's own statewide sampling tested 1 plant of New Carlisle City (latest sample April 2021). The highest result was PFBS at 5.2 ppt (ppt is the same unit as ng/L), against Ohio's action level of 2,100 ppt. Those action levels are the ones Ohio EPA used for the survey; the 2024 federal limit for PFOA and PFOS is 4 ng/L.
| Compound | Highest result | Federal limit |
|---|---|---|
| PFOA | not detected | 4 ng/L |
| PFOS | not detected | 4 ng/L |
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 New Carlisle City's samples in 2019, the last year it was sampled, was 29.5 µg/L. The worst yearly average was 35.3 µg/L and the highest single sample was 50.5 µg/L, from 14 samples taken from 2013 to 2019.
For HAA5, the average in the last year sampled was 6.8 µg/L. The worst yearly average was 9.7 µg/L and the highest single sample was 15.4 µg/L, from 14 samples.
| Byproduct | Limit | Latest yearly average | Worst yearly average | Highest sample | Samples |
|---|---|---|---|---|---|
| TTHM | 80 µg/L | 29.5 µg/L (2019) | 35.3 µg/L | 50.5 µg/L | 14 |
| HAA5 | 60 µg/L | 6.8 µg/L | 9.7 µg/L | 15.4 µg/L | 14 |
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 5.2 mg/L (as nitrogen), in 2019, the last year sampled. No sample was over the limit of 10 mg/L. Nitrate above 10 is unsafe for infants.
Arsenic was not detected in 2 samples (limit 10 µg/L).
| Contaminant | Samples | Highest result | Limit | Samples over limit |
|---|---|---|---|---|
| Nitrate (as nitrogen) | 9 | 5.2 mg/L | 10 mg/L | 0 |
| Arsenic | 2 | not detected | 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 2 samples each.
| Compound | Limit | Samples | Detected in | Highest result | Samples over limit |
|---|---|---|---|---|---|
| Benzene | 5 µg/L | 2 | 0 of 2 | not detected | 0 |
| Carbon tetrachloride | 5 µg/L | 2 | 0 of 2 | not detected | 0 |
| 1,2-dichloroethane | 5 µg/L | 2 | 0 of 2 | not detected | 0 |
| Trichloroethylene (TCE) | 5 µg/L | 2 | 0 of 2 | not detected | 0 |
| Tetrachloroethylene (PCE) | 5 µg/L | 2 | 0 of 2 | not detected | 0 |
| Vinyl chloride | 2 µg/L | 2 | 0 of 2 | 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: barium in 2 of 2 samples, highest 84.4 µg/L (limit 2,000); mercury in 1 of 18 samples, highest 0.2 µg/L (limit 2). Not detected: atrazine, alachlor, chromium, cadmium, selenium, and thallium, in 2 samples each.
| Substance | Kind | Limit | Samples | Detected in | Highest result | Samples over limit |
|---|---|---|---|---|---|---|
| Atrazine | Farm chemical | 3 µg/L | 2 | 0 of 2 | not detected | 0 |
| Alachlor | Farm chemical | 2 µg/L | 2 | 0 of 2 | not detected | 0 |
| Chromium | Metal | 100 µg/L | 2 | 0 of 2 | not detected | 0 |
| Cadmium | Metal | 5 µg/L | 2 | 0 of 2 | not detected | 0 |
| Barium | Metal | 2,000 µg/L | 2 | 2 of 2 | 84.4 µg/L | 0 |
| Mercury | Metal | 2 µg/L | 18 | 1 of 18 | 0.2 µg/L | 0 |
| Selenium | Metal | 50 µg/L | 2 | 0 of 2 | not detected | 0 |
| Thallium | Metal | 2 µg/L | 2 | 0 of 2 | 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, 5 of 586 routine total coliform samples taken in the distribution system at New Carlisle City tested positive (0.85%); in 2019, the last year on file, 1 of 72 did. E. coli was found in 1 of 271 samples tested for it.
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 New Carlisle City 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 0.32 mg/L.
EPA's treatment table lists no fluoridation step at New Carlisle City.
Measured fluoride: 0.3 mg/L on average at the plant's entry points in 2017 (below the 0.7 mg/L target); samples ran from 0.24 to 0.3 mg/L across 2 samples 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.
Lithium
Lithium was not detected in 2 UCMR 5 samples at New Carlisle City, last sampled in 2023 (the method reports from 9 µg/L).
Lithium is not regulated. EPA's draft health reference level is 10 µg/L, and it occurs naturally in deep groundwater, so well systems in the northwest run highest.
Source: EPA UCMR 5 occurrence data (final release, August 2026), samples from 2023 to 2025.
How well the service area is mapped
EPA estimated the service area of New Carlisle City with a computer model rather than drawing it from the utility's map, so its edges are approximate.
Counting the people who live in the ZIP codes it overlaps, this atlas estimates 5,305 residents are inside the boundary, 91% of the 5,800 people New Carlisle City reports serving.
The resident count is an estimate from 2020 Census ZIP-code populations, not a count of customers.
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 — 1 ZIP code 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 OH1203312 (EPA ECHO).
Notable facts: newcarlisleohio.gov, en.wikipedia.org
History: newcarlisleohio.gov, en.wikipedia.org
Water quality: newcarlisleohio.gov
Planned work: newcarlisleohio.gov
Water pressure: newcarlisleohio.gov
Rates: newcarlisleohio.gov, newcarlisleohio.gov
Sewers: newcarlisleohio.gov
Treatment: newcarlisleohio.gov, newcarlisleohio.gov
Supply stress: newcarlisleohio.gov
