Water system
HCWSD - East Cadiz
EPA ID OH3439717 · Harrison County · 191 people served · owned by a local government
HCWSD - East Cadiz buys its water from Cadiz Village.
The system's record
- Water bodies
- Tappan Lake
- Raw intakes
- Cadiz Tappan Lake
- Serves
- 3,353 people · Harrison County
- EPA ID
- OH3400214
About this area's water
Water quality & impurities
EPA compliance record
Lead at the tap: 90th-percentile result 0 ppb in 2026 (action level 15 ppb).
EPA record: no health-based violations since 2015.
EPA compliance record · Cadiz Village (treats the water)
Lead at the tap: 90th-percentile result 0 ppb in 2025 (action level 15 ppb).
EPA health-based violations since 2015:
- 2026Interim Enhanced Surface Water Treatment Rule · turbidity above the monthly limit · known
- 2025Interim Enhanced Surface Water Treatment Rule · turbidity above the limit in a single reading; turbidity above the monthly limit · returned to compliance
- 2024Stage 1 Disinfectants and Disinfection Byproducts Rule · no certified operator · returned to compliance
- 2024Lead and Copper Rule Revisions · lead service line inventory missing or incomplete (a records requirement, not a lead test result) · returned to compliance
- 2018Interim Enhanced Surface Water Treatment Rule · turbidity above the monthly limit · returned to compliance
EPA's count of 8 includes 3 repeat quarterly violations of the problems listed.
13 violations of any kind logged since 2020: 2 for required testing that was missed or reported late; 4 for a report, record or notice that was missing, late or incomplete (the yearly water quality report, a public notice, lead line records); 7 health-based.
Present in 1 ZIP code
Serves
No ZIP code has HCWSD - East Cadiz on record as its main water supplier.
Also present in 1 more ZIP code
- 43907 · Cadiz0% 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
HCWSD - East Cadiz buys its water from Cadiz Village.
No other system is on record buying water from HCWSD - East Cadiz.
What the records show about HCWSD - East Cadiz
Who runs it
EPA's record describes HCWSD - East Cadiz as owned by a local government. It has 90 service connections and serves 191 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 740-942-0411.
Source: EPA Safe Drinking Water Information System (SDWIS), water system record.
How the water is treated
HCWSD - East Cadiz buys water that Cadiz Village treats first, so the steps that count are the seller's. EPA's treatment table registers these steps for Cadiz Village: aeration, coagulation and settling, chlorine disinfection, fluoridation, lime softening, powdered activated carbon, and sand or media filtration.
HCWSD - East Cadiz 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 HCWSD - East Cadiz since 2015.
EPA logs no violations of any kind for HCWSD - East Cadiz 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 June 2026, the 90th-percentile lead result at HCWSD - East Cadiz 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 1.2 ppb, in the period ending December 2025.
EPA has 9 sampling periods on file for HCWSD - East Cadiz since 2016, the first ending in 2018; 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 HCWSD - East Cadiz sent EPA, 79 lines are counted.
| Material | Lines |
|---|---|
| Lead | 0 |
| Galvanized, needing replacement | 0 |
| Unknown material | 5 |
| Not lead | 74 |
| All lines | 79 |
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
The water HCWSD - East Cadiz buys is treated by Cadiz Village, so the results below are Cadiz Village's.
EPA's fifth national round of testing (UCMR 5) took 5 samples of the water entering the pipes of Cadiz Village in 2024 to 2025 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 Cadiz Village (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 HCWSD - East Cadiz's samples in 2019, the last year it was sampled, was 56.4 µg/L. The worst yearly average was 70.7 µg/L and the highest single sample was 101 µg/L, from 9 samples taken from 2018 to 2019.
For HAA5, the average in the last year sampled was 29.1 µg/L. The worst yearly average was 49.2 µg/L and the highest single sample was 59.6 µg/L, from 9 samples.
| Byproduct | Limit | Latest yearly average | Worst yearly average | Highest sample | Samples |
|---|---|---|---|---|---|
| TTHM | 80 µg/L | 56.4 µg/L (2019) | 70.7 µg/L | 101 µg/L | 9 |
| HAA5 | 60 µg/L | 29.1 µg/L | 49.2 µg/L | 59.6 µg/L | 9 |
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
The water HCWSD - East Cadiz buys is treated by Cadiz Village, so the results below are Cadiz Village's.
Nitrate: the highest of 96 samples was 1.5 mg/L (as nitrogen) in 2015; in 2019, the last year sampled, the highest was 0.69 mg/L. No sample was over the limit of 10 mg/L. Nitrate above 10 is unsafe for infants.
Arsenic was not detected in 8 samples (limit 10 µg/L).
| Contaminant | Samples | Highest result | Limit | Samples over limit |
|---|---|---|---|---|
| Nitrate (as nitrogen) | 96 | 1.5 mg/L | 10 mg/L | 0 |
| Arsenic | 8 | 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 of Cadiz Village.
Solvents and fuels
The water HCWSD - East Cadiz buys is treated by Cadiz Village, so the results below are Cadiz Village'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 8 samples each.
| Compound | Limit | Samples | Detected in | Highest result | Samples over limit |
|---|---|---|---|---|---|
| Benzene | 5 µg/L | 8 | 0 of 8 | not detected | 0 |
| Carbon tetrachloride | 5 µg/L | 8 | 0 of 8 | not detected | 0 |
| 1,2-dichloroethane | 5 µg/L | 8 | 0 of 8 | not detected | 0 |
| Trichloroethylene (TCE) | 5 µg/L | 8 | 0 of 8 | not detected | 0 |
| Tetrachloroethylene (PCE) | 5 µg/L | 8 | 0 of 8 | not detected | 0 |
| Vinyl chloride | 2 µg/L | 8 | 0 of 8 | 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 Cadiz Village.
Farm chemicals and metals
The water HCWSD - East Cadiz buys is treated by Cadiz Village, so the results below are Cadiz Village's.
EPA's file holds results for 8 of the nine herbicides and metals it checked. Not detected: atrazine, alachlor, chromium, cadmium, barium, mercury, selenium, and thallium, in 8 samples each.
| Substance | Kind | Limit | Samples | Detected in | Highest result | Samples over limit |
|---|---|---|---|---|---|---|
| Atrazine | Farm chemical | 3 µg/L | 8 | 0 of 8 | not detected | 0 |
| Alachlor | Farm chemical | 2 µg/L | 8 | 0 of 8 | not detected | 0 |
| Chromium | Metal | 100 µg/L | 8 | 0 of 8 | not detected | 0 |
| Cadmium | Metal | 5 µg/L | 8 | 0 of 8 | not detected | 0 |
| Barium | Metal | 2,000 µg/L | 8 | 0 of 8 | not detected | 0 |
| Mercury | Metal | 2 µg/L | 8 | 0 of 8 | not detected | 0 |
| Selenium | Metal | 50 µg/L | 8 | 0 of 8 | not detected | 0 |
| Thallium | Metal | 2 µg/L | 8 | 0 of 8 | 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 of Cadiz Village.
Bacteria in the pipes
From 2012 to 2019, 0 of 18 routine total coliform samples taken in the distribution system at HCWSD - East Cadiz tested positive (0%); in 2019, the last year on file, 0 of 12 did. E. coli was never found in the 18 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 HCWSD - East Cadiz buys its water from Cadiz Village, a system that adjusts the fluoride level to the recommended level for preventing tooth decay.
EPA's treatment table lists fluoridation among the steps at Cadiz Village, which treats the water HCWSD - East Cadiz buys.
Measured fluoride: 0.76 mg/L on average leaving the plants of Cadiz Village, which supplies HCWSD - East Cadiz, in 2019 (in the range dentists aim for); samples ran from 0.76 to 1.36 mg/L across 8 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 4 UCMR 5 samples at Cadiz Village, which supplies HCWSD - East Cadiz, last sampled in 2025 (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.
Algal toxins
The water HCWSD - East Cadiz buys is treated by Cadiz Village, so the results below are Cadiz Village's.
Ohio EPA tests for microcystin, a toxin that harmful algal blooms can release, in raw water at the intake and in treated water.
At the intake, microcystin was detected 259 times in 484 raw-water samples, across 11 bloom seasons (2016 to 2026); the highest raw-water result was 9.97 µg/L on November 17, 2020. The highest raw-water result since 2024 was 8.98 µg/L.
In treated water, microcystin was detected 1 time; the highest result was 4.04 µg/L (July 2021), above the 1.6 µg/L do-not-drink level.
In all, 989 samples from 2016 to 2026, the latest on August 19, 2026.
| Water | Samples | Detections | Highest result |
|---|---|---|---|
| Raw water, at the intake | 484 | 259 | 9.97 µg/L |
| Treated water | 505 | 1 | 4.04 µg/L |
The ten-day advisory levels for treated water are 0.3 µg/L for children under six and 1.6 µg/L for everyone else. Any detection at the intake triggers more frequent testing until two clean weeks.
Source: Ohio EPA public water system harmful algal bloom monitoring, 2016 to present (HAB data, fetched September 2026).
How well the service area is mapped
EPA estimated the service area of HCWSD - East Cadiz 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.
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 OH3439717 (EPA ECHO).
