Is Round Prairie Water Coop Tap Water Safe? Quality Report

Water source: SWP
Ownership: Private
Counties served: Sangamon

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.

health-based violations

violations on file

still open

Violation	Type	Status	Period
MR	Monitoring	Archived	2025-10-01 → 2025-12-31
MR	Monitoring	Archived	2025-10-01 → 2025-12-31
MR	Monitoring	Resolved	2025-04-01 → 2025-06-30
MR	Monitoring	Resolved	2025-04-01 → 2025-06-30
MR	Monitoring	Resolved	2025-04-01 → 2025-06-30
MR	Monitoring	Resolved	2025-04-01 → 2025-06-30
MR	Monitoring	Resolved	2025-04-01 → 2025-06-30
MR	Monitoring	Resolved	2025-04-01 → 2025-06-30

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 95th percentile of this system's samples — over 100% is worth reading, but is not by itself a violation. Where a single sample came in higher than that percentile, it is noted under the bar. Formal violations are listed separately.

Contaminant	Level vs EPA limit	Detection rate	Source	Period
Copper	96.2 µg/L 7.4% of the EPA limit 1300 µg/L worst single sample: 450 µg/L	60/70	SYR4	2014–2018
Bromodichloromethane	10.7 µg/L No EPA limit set worst single sample: 11.5 µg/L	25/25	SYR4	2013–2019
Chloroform	56.446 µg/L No EPA limit set worst single sample: 63.2 µg/L	25/25	SYR4	2013–2019
Dibromochloromethane	4.132 µg/L No EPA limit set worst single sample: 4.6 µg/L	25/25	SYR4	2013–2019
Dichloroacetic Acid	24.4 µg/L No EPA limit set worst single sample: 25.7 µg/L	25/25	SYR4	2013–2019
TTHM	67.512 µg/L 84% of the EPA limit 80 µg/L worst single sample: 76.1 µg/L	25/25	SYR4	2013–2019
Total Haloacetic Acids (HAA5)	30.92 µg/L 52% of the EPA limit 60 µg/L worst single sample: 32.2 µg/L	25/25	SYR4	2013–2019
Trichloroacetic Acid	6.664 µg/L No EPA limit set worst single sample: 7.31 µg/L	25/25	SYR4	2013–2019
Lead	10.18 µg/L 68% of the EPA limit 15 µg/L worst single sample: 13 µg/L	13/70	SYR4	2014–2018
Lead	0.0015 mg/L 10% of the EPA limit 0.0150 mg/L	7/7	LCR	2024
Dibromoacetic Acid	1.3075 µg/L No EPA limit set worst single sample: 1.31 µg/L	6/25	SYR4	2013–2019
Monochloroacetic Acid	4.988 µg/L No EPA limit set worst single sample: 5.18 µg/L	4/25	SYR4	2013–2019
Monobromoacetic Acid	2.34 µg/L No EPA limit set	1/25	SYR4	2013–2019

1 contaminants tested, none detected

Bromoform

Frequently asked questions about Round Prairie Water Coop

Is Round Prairie Water Coop tap water safe to drink?

EPA monitoring detected 13 contaminants in Round Prairie Water Coop'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 Round Prairie Water Coop's water?

EPA monitoring detected Copper, Bromodichloromethane, Chloroform, Dibromochloromethane, Dichloroacetic Acid, and others. The full list with the level and data source for each is above.

How many people does Round Prairie Water Coop serve?

Round Prairie Water Coop reports serving 813 people, per its EPA record.

Has Round Prairie Water Coop had any water quality violations?

The EPA has 8 violations on file for Round Prairie Water Coop, of which 0 are health-based (a contaminant limit or required treatment was breached) and 0 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.