Is Thornton Waterworks Tap Water Safe? Quality Report

Water source: Ground water
Ownership: Local government
Counties served: Calhoun

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
MCL	Health-based	Resolved	2014-07-01 → 2014-07-31
MCL	Health-based	Resolved	2014-07-01 → 2014-07-31
MCL	Health-based	Resolved	2014-07-01 → 2014-07-31
MCL	Health-based	Archived	1998-07-01 → 1998-07-31
MCL	Health-based	Archived	1998-07-01 → 1998-07-31
MCL	Health-based	Archived	1998-07-01 → 1998-07-31
Other	Monitoring	Resolved	2021-07-01

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
Gross Beta Particle Activity	21.25 pCi/L No EPA limit set worst single sample: 25 pCi/L	16/24	SYR4	2013–2019
Copper	85.86 µg/L 6.6% of the EPA limit 1300 µg/L worst single sample: 85.9 µg/L	9/30	SYR4	2012–2018
Dibromochloromethane	5.961 µg/L No EPA limit set worst single sample: 7.2 µg/L	8/12	SYR4	2013–2019
Lead	26.4 µg/L 176% of the EPA limit, at the 95th percentile of samples — 15 µg/L worst single sample: 39 µg/L	8/33	SYR4	2012–2019
Lead	0.0080 mg/L 53% of the EPA limit 0.0150 mg/L	7/7	LCR	2003
Bromoform	4.194 µg/L No EPA limit set worst single sample: 4.4 µg/L	5/10	SYR4	2013–2019
Dibromoacetic Acid	1.54 µg/L No EPA limit set worst single sample: 1.6 µg/L	5/7	SYR4	2014–2019
Total Haloacetic Acids (HAA5)	5.5 µg/L 9.2% of the EPA limit 60 µg/L worst single sample: 6.2 µg/L	5/7	SYR4	2014–2019
Bromodichloromethane	4.6645 µg/L No EPA limit set worst single sample: 5.2 µg/L	4/10	SYR4	2013–2019
TTHM	18.125 µg/L 23% of the EPA limit 80 µg/L worst single sample: 20.3 µg/L	4/7	SYR4	2014–2019
Chloroform	3.459 µg/L No EPA limit set worst single sample: 3.6 µg/L	2/10	SYR4	2013–2019
Monobromoacetic Acid	1.485 µg/L No EPA limit set worst single sample: 1.5 µg/L	2/7	SYR4	2014–2019
Nitrate-Nitrite	160 µg/L 1.6% of the EPA limit 10000 µg/L	2/16	SYR4	2012–2019
Dichloroacetic Acid	2.3 µg/L No EPA limit set	1/7	SYR4	2014–2019
Trichloroacetic Acid	1 µg/L No EPA limit set	1/7	SYR4	2014–2019

62 contaminants tested, none detected

1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2,4-Trichlorobenzene1,2-DIBROMO-3-CHLOROPROPANE1,2-Dichloroethane1,2-Dichloropropane2,4,5-TP2,4-DAntimony, TotalArsenicAtrazineBhc-GammaBariumBenzeneBenzo(A)PyreneBeryllium, TotalChlorobenzeneCyanideCadmiumCarbofuranCarbon TetrachlorideChlordaneChromiumDichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDinosebDiquatEthylene DibromideEndothallEndrinEthylbenzeneFluorideGlyphosateHexachlorobenzeneHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorMonochloroacetic AcidOxamylPentachlorophenolPicloramSeleniumSimazineStyreneTetrachloroethyleneThallium, TotalTolueneTotal Polychlorinated Biphenyls (PCB)ToxapheneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact: BURKE, RANDALL W
Phone: 870-884-0811
Email: [email protected]

Frequently asked questions about Thornton Waterworks

Is Thornton Waterworks tap water safe to drink?

EPA monitoring detected 15 contaminants in Thornton Waterworks'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 Thornton Waterworks's water?

EPA monitoring detected Gross Beta Particle Activity, Copper, Dibromochloromethane, Lead, Lead, and others. The full list with the level and data source for each is above.

How many people does Thornton Waterworks serve?

Thornton Waterworks reports serving 900 people in Arkansas, per its EPA record.

Has Thornton Waterworks had any water quality violations?

The EPA has 7 violations on file for Thornton Waterworks, of which 6 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.