Water system
South Lebanon No 2
EPA ID OH8361413 · Warren County · 180 people served
South Lebanon No 2 buys its water from Warren County.
The system's record
- Aquifer
- Buried Valley Aquifer System - Little Miami valley (Renneker plant) plus Great Miami valley (Franklin plant)
- Water bodies
- Little Miami River, Great Miami River
- Active wells
- 24
- Serves
- 81,975 people · Warren County
- EPA ID
- OH8301512
About this area's water Warren County
Did you know
- Warren County reports no lead, no galvanized-requiring-replacement, and no unknown-material service lines anywhere in its distribution system.
- The system is a patchwork of five sub-systems: Franklin-Clearcreek and Richard Renneker on county wells, Socialville on Cincinnati water, and Pennyroyal and Sharts Road on Springboro water.
- A November 2024 lab mix-up - nitrite tested instead of nitrate - drew an Ohio EPA monitoring violation even though the retest came back below the nitrate limit.
- The 24 county wells pump more than 2 billion gallons a year, and the finished water averages 140 mg/L of hardness, about 8 grains.
History5
- 1960sThe Warren County Water & Sewer Department began operating and says it has never permitted lead pipe in its mains or on customer service laterals.
- 2022Softening started up at both plants after a corrosion control study done with Ohio EPA, and nanofiltration membrane treatment was added.
- January 2023Nanofiltration membrane construction was completed, cutting hardness and improving removal of PFAS, pesticides and herbicides.
- July 2024Ohio EPA approved merging the Franklin-Clearcreek and Richard Renneker systems into the new Warren County Public Water System.
- April 2025The county began building ion exchange PFAS treatment at the Renneker plant, scheduled to finish that November.
Treatment & pressure
How it is treated
24 wells in 5 wellfields feed two county plants: Franklin Area (7 wells) and Renneker (4 wellfields). Softening, nanofiltration membranes, pH control with sodium hydroxide and orthophosphate, then fluoride and chlorine; Renneker adds ion exchange for PFAS.
Water pressure
Not published; the county uses elevated storage such as the 20 Mile elevated tower rather than publishing a system average.
What it costs
$5.70 per 1,000 gallons
2026 water: $34.20 bimonthly minimum covers 0-6,000 gal, then $5.70 per 1,000 gal, plus a $5.00 bimonthly repair/replacement charge. Sewer billed separately.
Water quality & impurities6
| Contaminant | Level | Limit | Year |
|---|---|---|---|
| PFAS (six federally regulated compounds) Non-detect in treated water in both 2023 and 2024 after the nanofiltration upgrade. | ND ppt | EPA MCLs… | 2024 |
| Perfluoropentanoic acid (PFPeA), UCMR5 Detected at the Franklin-Clearcreek plant; non-detect in the Socialville system. | 0.0017 avg… ppb | unregulated… | 2024 |
| PFOA, UCMR5 Non-detect at both Franklin-Clearcreek and Socialville. | ND ppb | unregulated… | 2024 |
| PFOS, UCMR5 Non-detect at both Franklin-Clearcreek and Socialville. | ND ppb | unregulated… | 2024 |
| Lithium, UCMR5 Non-detect at both sampling points; no MCL exists for lithium. | ND ppb | unregulated… | 2024 |
| Nitrate Nov. 2024 lab ran nitrite not nitrate; the late retest was below the MCL but drew a monitoring violation. | below MCL ppm | 10 | 2024 |
EPA compliance record · South Lebanon No 2
Lead at the tap: 90th-percentile result 0.5 ppb in 2025 (action level 15 ppb).
EPA record: no health-based violations since 2015.
EPA compliance record · Warren County (treats the water)
Lead at the tap: 90th-percentile result 1.3 ppb in 2026 (action level 15 ppb).
EPA record: no health-based violations since 2015.
2 violations of any kind logged since 2020: 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 & plans4
Recent and current work
- Nanofiltration membrane treatment at both plants · 2023 · completed
Added in 2022 and completed January 2023 at Renneker and Franklin Area; cuts hardness and removes PFAS, pesticides and herbicides. - Renneker Water Treatment Plant ion exchange PFAS system · 2025 · completed
Anion exchange added to the existing nanofiltration building; AECOM engineer, Shook Construction builder. Cost not published. - Franklin-Clearcreek / Richard Renneker system merger · 2024 · completed
Ohio EPA approved consolidation into a single Warren County Public Water System in July 2024.
Planned or needed
- Future capital program
We found no public Warren County capital improvement plan or Ohio EPA loan-list entry for future water projects.
Supply stress
Ohio EPA classes the Great and Little Miami buried valley aquifers highly susceptible, given contaminant sources in the protection areas. Low PFAS at the Renneker wellfields drove nanofiltration then ion exchange. 15% of customers drink Springboro water, whose aquifer sits under 5 ft of cover.
Sewers
Sanitary
The Warren County Water & Sewer Department also runs county sanitary sewer. 2026 sewer rates are a $34.32 bimonthly minimum for 0-6,000 gal then $5.72 per 1,000 gal, with a separate Carlisle-area sewer-only rate.
Sourcesverified
Compiled from the utility's own reports and public records, then independently re-checked against primary sources.
Present in 0 ZIP codes
Serves
No ZIP code has South Lebanon No 2 on record as its main water supplier.
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
South Lebanon No 2 buys its water from Warren County.
No other system is on record buying water from South Lebanon No 2.
What the records show about South Lebanon No 2
Who runs it
EPA's record says South Lebanon No 2 has 80 service connections and serves 180 people.
EPA classes it as a community water system, one that serves the same residents all year.
Its office telephone on EPA's record is 513-770-4871.
Source: EPA Safe Drinking Water Information System (SDWIS), water system record.
How the water is treated
South Lebanon No 2 buys water that Warren County treats first, so the steps that count are the seller's. EPA's treatment table registers these steps for Warren County: aeration, corrosion control, chlorine disinfection, dechlorination, fluoridation, ion-exchange softening, membrane filtration, and sand or media filtration.
South Lebanon No 2 adds nothing of its own on that table.
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 South Lebanon No 2 since 2015.
EPA logs no violations of any kind for South Lebanon No 2 since 2020.
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 South Lebanon No 2 was 0.5 ppb, under both the current 15 ppb action level and the 10 ppb level that applies from 2027.
EPA has 1 sampling period on file for South Lebanon No 2 since 2016, the first ending in 2025; no period was above 10 ppb.
EPA's service line inventory dashboard lists South Lebanon No 2 with no line counts; its status reads: did not report any required service line types.
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.
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
The water South Lebanon No 2 buys is treated by Warren County, so the results below are Warren County's.
EPA's fifth national round of testing (UCMR 5) took 2 samples of the water entering the pipes of Warren County in 2023 and measured 29 PFAS. No PFAS was detected, PFOA and PFOS (federal limit 4 ng/L each) among them.
Ohio EPA's own statewide sampling tested 1 plant of Warren County (latest sample March 2021). The highest result was PFOS at 8.6 ppt (ppt is the same unit as ng/L), against Ohio's action level of 70 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.
Ohio EPA's current sampling status map lists 2 plants of Warren County as sampled, most recently July 2026.
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.
Nitrate, arsenic and radioactivity
The water South Lebanon No 2 buys is treated by Warren County, so the results below are Warren County's.
Nitrate: the highest of 8 samples was 0.91 mg/L (as nitrogen) in 2012; in 2019, the last year sampled, the highest was 0.88 mg/L. No sample was over the limit of 10 mg/L. Nitrate above 10 is unsafe for infants.
Arsenic was not detected in 3 samples (limit 10 µg/L).
| Contaminant | Samples | Highest result | Limit | Samples over limit |
|---|---|---|---|---|
| Nitrate (as nitrogen) | 8 | 0.91 mg/L | 10 mg/L | 0 |
| Arsenic | 3 | 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.
EPA's file lumps the entry-point samples of all 2 plants of Warren County together, so a result over a limit may come from a plant that serves a different part of town.
Source: EPA Six-Year Review 4 compliance monitoring data, 2012 to 2019, finished water of Warren County.
Solvents and fuels
The water South Lebanon No 2 buys is treated by Warren County, so the results below are Warren County's.
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 of Warren County.
Farm chemicals and metals
The water South Lebanon No 2 buys is treated by Warren County, so the results below are Warren County's.
EPA's file holds results for 8 of the nine herbicides and metals it checked. Detected: barium in 3 of 3 samples, highest 98.1 µg/L (limit 2,000). Not detected: atrazine, alachlor, chromium, cadmium, mercury, selenium, 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 | 3 of 3 | 98.1 µg/L | 0 |
| Mercury | Metal | 2 µg/L | 3 | 0 of 3 | not detected | 0 |
| Selenium | Metal | 50 µg/L | 3 | 0 of 3 | not detected | 0 |
| Thallium | Metal | 2 µg/L | 3 | 0 of 3 | not detected | 0 |
Non-detects count as zero in the highest-result column.
EPA's file lumps the entry-point samples of all 2 plants of Warren County together, so a result over a limit may come from a plant that serves a different part of town.
Source: EPA Six-Year Review 4 compliance monitoring data, 2012 to 2019, finished water of Warren County.
Fluoride
EPA's treatment table lists fluoridation among the steps at Warren County, which treats the water South Lebanon No 2 buys.
Measured fluoride: 1.1 mg/L on average leaving the plants of Warren County, which supplies South Lebanon No 2, in 2019 (in the range dentists aim for); samples ran from 0.92 to 1.1 mg/L across 3 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 Warren County, which supplies South Lebanon No 2, 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.
On the map
Show this system's territory on the map — 0 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 OH8361413 (EPA ECHO).
