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Tap water quality report

Mount Olive

EPA monitoring tested this supplier for 109 contaminants and detected 21. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

109
contaminants tested
21
detected
2,193
people served
224
health-based violations
Illinois rankingsLead in IllinoisPFAS in Illinois
Water source
SWP
Ownership
Local government
Counties served
Macoupin

Compliance record

Formal violations the EPA has on file for this supplier. A health-based violation means a contaminant limit or a required treatment was breached; the rest are monitoring or reporting failures — still violations, but not a measured health risk.

224
health-based violations
280
violations on file
2
still open
ViolationTypeStatusPeriod
TT Health-based Resolved 2025-12-01 → 2025-12-31
TT Health-based Resolved 2025-12-01 → 2025-12-31
TT Health-based Resolved 2025-12-01 → 2025-12-31
TT Health-based Resolved 2025-12-01 → 2025-12-31
TT Health-based Resolved 2025-11-01 → 2025-11-30
TT Health-based Resolved 2025-11-01 → 2025-11-30
TT Health-based Resolved 2025-11-01 → 2025-11-30
TT Health-based Resolved 2025-11-01 → 2025-11-30
TT Health-based Resolved 2025-10-01 → 2025-10-31
TT Health-based Resolved 2025-10-01 → 2025-10-31

Other contaminants detected

Each bar shows the measured level as a share of the EPA limit: green is well under, amber is close to it, red is over. For lead and copper the limit applies to exactly the 90th-percentile figure shown, so red there means a real exceedance. For everything else the limit applies to a running annual average while the figure is the single worst sample on record — over 100% is worth reading, but is not by itself a violation. Formal violations are listed separately.
ContaminantLevel vs EPA limitDetection rateSourcePeriod
Copper
1800 µg/L 138%
of the EPA limit, in the worst sample — 1300 µg/L
 56/70 SYR4 2012–2017
TTHM
133 µg/L 166%
of the EPA limit, in the worst sample — 80 µg/L
 33/33 SYR4 2012–2019
Chloroform
120 µg/L
No EPA limit set
 32/32 SYR4 2012–2019
Bromodichloromethane
15.7 µg/L
No EPA limit set
 31/32 SYR4 2012–2019
Total Haloacetic Acids (HAA5)
76 µg/L 127%
of the EPA limit, in the worst sample — 60 µg/L
 29/32 SYR4 2012–2019
Trichloroacetic Acid
38.2 µg/L
No EPA limit set
 27/32 SYR4 2012–2019
Dichloroacetic Acid
45 µg/L
No EPA limit set
 25/32 SYR4 2012–2019
Atrazine
4.6 µg/L 153%
of the EPA limit, in the worst sample — 3 µg/L
 22/33 SYR4 2012–2019
Lead
0.0078 mg/L 52%
of the EPA limit 0.0150 mg/L
 20/20 LCR 2025
Lead
11.9 µg/L 79%
of the EPA limit 15 µg/L
 18/70 SYR4 2012–2017
Nitrate
730 µg/L 7.3%
of the EPA limit 10000 µg/L
 16/16 SYR4 2012–2019
Simazine
2.9 µg/L 73%
of the EPA limit 4 µg/L
 16/32 SYR4 2012–2019
Dibromochloromethane
4.275 µg/L
No EPA limit set
 15/32 SYR4 2012–2019
Barium
50 µg/L 2.5%
of the EPA limit 2000 µg/L
 8/8 SYR4 2012–2019
Fluoride
1330 µg/L 33%
of the EPA limit 4000 µg/L
 8/8 SYR4 2012–2019
Arsenic
2.6 µg/L 26%
of the EPA limit 10 µg/L
 4/8 SYR4 2012–2019
Nitrate-Nitrite
630 µg/L 6.3%
of the EPA limit 10000 µg/L
 3/3 SYR4 2012–2018
Selenium
3.2 µg/L 6.4%
of the EPA limit 50 µg/L
 3/8 SYR4 2012–2019
Monobromoacetic Acid
6.93 µg/L
No EPA limit set
 2/32 SYR4 2012–2019
Monochloroacetic Acid
3.35 µg/L
No EPA limit set
 2/32 SYR4 2012–2019
Combined Radium (-226 And -228)
0.7580 pCi/L 15%
of the EPA limit 5 pCi/L
 1/1 SYR4 2012
88 contaminants tested, none detected
1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2,4-Trichlorobenzene1,2-DIBROMO-3-CHLOROPROPANE1,2-Dichloroethane1,2-Dichloropropane11Cl-PF3OUdS2,4,5-TP2,4-D4:2 Fts6:2 Fts8:2 Fts9Cl-PF3ONSAdonaAntimony, TotalAsbestosBhc-GammaBenzeneBenzo(A)PyreneBeryllium, TotalBromoformChlorobenzeneCyanideCadmiumCarbofuranCarbon TetrachlorideChlordaneChromiumDichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDibromoacetic AcidDinosebDiquatEthylene DibromideEndothallEndrinEthylbenzeneHexachlorobenzeneHfpo-DaHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorNetfosaaNfdhaNmefosaaNitriteOxamylPfbaPFBSPfdaPfdoaPfeesaPfhpaPfhpsPfhxaPFHXSPfmbaPfmpaPFNAPFOAPFOSPfpeaPfpesPftaPftrdaPfunaPentachlorophenolPicloramStyreneTetrachloroethyleneThallium, TotalTolueneTotal Polychlorinated Biphenyls (PCB)ToxapheneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneLithiumO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact
HORSTMANN, CHRISTOPHER L.
Phone
618-973-0633
Email
certopinc@gmail.com

Frequently asked questions about Mount Olive

Is Mount Olive tap water safe to drink?

EPA monitoring detected 21 contaminants in Mount Olive's water. A detection isn't the same as a violation — most levels are within federal limits. See each level and source above, and the utility's annual Consumer Confidence Report for its official compliance status.

What contaminants were detected in Mount Olive's water?

EPA monitoring detected Copper, TTHM, Chloroform, Bromodichloromethane, Total Haloacetic Acids (HAA5), and others. The full list with the level and data source for each is above.

How many people does Mount Olive serve?

Mount Olive reports serving 2,193 people in Illinois, per its EPA record.

Has Mount Olive had any water quality violations?

The EPA has 280 violations on file for Mount Olive, of which 224 are health-based (a contaminant limit or required treatment was breached) and 2 remain open. The rest are monitoring or reporting failures.

Where does this data come from?

Every figure is official EPA drinking-water monitoring — the Lead & Copper Rule, the UCMR-5 nationwide testing program, and the EPA Six-Year Review — not our own testing. Each number is labelled with its source and period.