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Tap water quality report

Atascadero State Hospital

EPA monitoring tested this supplier for 86 contaminants and detected 26. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

86
contaminants tested
26
detected
4,100
people served
0
health-based violations
California rankingsLead in CaliforniaPFAS in California
Water source
Ground water
Ownership
State government
Counties served
San Luis Obispo

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.

0
health-based violations
6
violations on file
0
still open
ViolationTypeStatusPeriod
MR Monitoring Resolved 2023-01-01 → 2023-12-31
MR Monitoring Resolved 2023-01-01 → 2023-12-31
MR Monitoring Resolved 2015-10-01 → 2015-10-31
MR Monitoring Resolved 2015-10-01 → 2015-10-31
MR Monitoring Resolved 2002-10-01 → 2002-10-31
MR Monitoring Resolved 2002-10-01 → 2002-10-31

PFAS detected

PFAS are industrial “forever chemicals”. These are the EPA's latest nationwide test results (2023–2025).
ContaminantMaxDetection ratePeriod
PFBS 0.0055 µg/L 2/2 2023
PFHXS 0.0340 µg/L 2/2 2023
PFOS 0.0330 µg/L 2/2 2023
Pfhxa 0.0036 µg/L 1/2 2023
Pfpes 0.0061 µg/L 1/2 2023

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.
ContaminantLevel vs EPA limitDetection rateSourcePeriod
Nitrate
2300 µg/L 23%
of the EPA limit 10000 µg/L
worst single sample: 3100 µg/L
82/82 SYR4 2012–2019
Lead
0.0 mg/L 0%
of the EPA limit 0.0150 mg/L
 28/28 LCR 2026
Fluoride
245 µg/L 6.1%
of the EPA limit 4000 µg/L
worst single sample: 300 µg/L
12/12 SYR4 2012–2019
Selenium
9 µg/L 18%
of the EPA limit 50 µg/L
 7/10 SYR4 2014–2019
Nitrate-Nitrite
900000 µg/L 9000%
of the EPA limit, at the 95th percentile of samples — 10000 µg/L
worst single sample: 1000000 µg/L
6/6 SYR4 2012–2019
Barium
105.2 µg/L 5.3%
of the EPA limit 2000 µg/L
worst single sample: 106 µg/L
5/10 SYR4 2014–2019
Bromodichloromethane
8.8 µg/L
No EPA limit set
worst single sample: 9 µg/L
5/5 SYR4 2013–2019
Bromoform
8.3 µg/L
No EPA limit set
worst single sample: 8.4 µg/L
5/5 SYR4 2013–2019
Chloroform
4 µg/L
No EPA limit set
 5/5 SYR4 2013–2019
Dibromoacetic Acid
7.4 µg/L
No EPA limit set
worst single sample: 8 µg/L
5/5 SYR4 2013–2019
Dibromochloromethane
12.76 µg/L
No EPA limit set
worst single sample: 13 µg/L
5/5 SYR4 2013–2019
TTHM
31.54 µg/L 39%
of the EPA limit 80 µg/L
worst single sample: 32 µg/L
5/5 SYR4 2013–2019
Total Haloacetic Acids (HAA5)
11.7 µg/L 19%
of the EPA limit 60 µg/L
worst single sample: 12 µg/L
5/5 SYR4 2013–2019
Arsenic
2 µg/L 20%
of the EPA limit 10 µg/L
 4/10 SYR4 2014–2019
Cadmium
1 µg/L 20%
of the EPA limit 5 µg/L
 3/10 SYR4 2014–2019
Chromium
3 µg/L 3%
of the EPA limit 100 µg/L
 2/10 SYR4 2014–2019
Dichloroacetic Acid
3.9 µg/L
No EPA limit set
worst single sample: 4 µg/L
2/5 SYR4 2013–2019
Combined Uranium
2.8757 µg/L 9.6%
of the EPA limit 30 µg/L
 1/1 SYR4 2017
Lead
1.2 µg/L 8%
of the EPA limit 15 µg/L
 1/10 SYR4 2014–2019
Monobromoacetic Acid
1 µg/L
No EPA limit set
 1/5 SYR4 2013–2019
Trichloroacetic Acid
7.23 µg/L
No EPA limit set
 1/5 SYR4 2013–2019
60 contaminants tested, none detected
1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2,4-Trichlorobenzene1,2-DIBROMO-3-CHLOROPROPANE1,2-Dichloroethane1,2-Dichloropropane11Cl-PF3OUdS4:2 Fts6:2 Fts8:2 Fts9Cl-PF3ONSAdonaAntimony, TotalAsbestosAtrazineBenzeneBeryllium, TotalChlorobenzeneCopperCyanideCarbon TetrachlorideDichloromethaneEthylene DibromideEthylbenzeneHfpo-DaLassoMercuryMonochloroacetic AcidNetfosaaNfdhaNmefosaaNitritePfbaPfdaPfdoaPfeesaPfhpaPfhpsPfmbaPfmpaPFNAPFOAPfpeaPftaPftrdaPfunaSimazineStyreneTetrachloroethyleneThallium, TotalTolueneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneLithiumO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact
DYE, RANDY
Phone
805-468-2249
Email
[email protected]

Frequently asked questions about Atascadero State Hospital

Is Atascadero State Hospital tap water safe to drink?

EPA monitoring detected 26 contaminants in Atascadero State Hospital'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 Atascadero State Hospital's water?

EPA monitoring detected Nitrate, Lead, Fluoride, Selenium, Nitrate-Nitrite, and others. The full list with the level and data source for each is above.

How many people does Atascadero State Hospital serve?

Atascadero State Hospital reports serving 4,100 people in California, per its EPA record.

Has Atascadero State Hospital had any water quality violations?

The EPA has 6 violations on file for Atascadero State Hospital, 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.