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Tap water quality report

Slo Csa No. 16 - Shandon

EPA monitoring tested this supplier for 57 contaminants and detected 16. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

57
contaminants tested
16
detected
1,085
people served
0
health-based violations
California rankingsLead in CaliforniaPFAS in California
Water source
SWP
Ownership
Local government
Counties served
San Luis Obispo

Compliance record

No violations on file. The EPA has no formal drinking-water violations recorded for this supplier.

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
4899.08 µg/L 49%
of the EPA limit 10000 µg/L
worst single sample: 5250 µg/L
102/102 SYR4 2012–2019
Lead
0.0 mg/L 0%
of the EPA limit 0.0150 mg/L
 26/26 LCR 2023
Fluoride
176.1 µg/L 4.4%
of the EPA limit 4000 µg/L
worst single sample: 177 µg/L
10/14 SYR4 2012–2019
Barium
136 µg/L 6.8%
of the EPA limit 2000 µg/L
worst single sample: 140 µg/L
9/9 SYR4 2012–2019
Arsenic
2.375 µg/L 24%
of the EPA limit 10 µg/L
worst single sample: 2.4 µg/L
6/10 SYR4 2012–2018
Nitrate-Nitrite
4605 µg/L 46%
of the EPA limit 10000 µg/L
worst single sample: 4690 µg/L
6/6 SYR4 2016–2018
Dibromochloromethane
11.73 µg/L
No EPA limit set
worst single sample: 13.5 µg/L
4/12 SYR4 2012–2019
TTHM
34.065 µg/L 43%
of the EPA limit 80 µg/L
worst single sample: 38.4 µg/L
4/12 SYR4 2012–2019
Total Haloacetic Acids (HAA5)
10.03 µg/L 17%
of the EPA limit 60 µg/L
worst single sample: 11.5 µg/L
4/12 SYR4 2012–2019
Bromodichloromethane
11.78 µg/L
No EPA limit set
worst single sample: 12.7 µg/L
3/12 SYR4 2012–2019
Chloroform
8.17 µg/L
No EPA limit set
worst single sample: 8.6 µg/L
3/12 SYR4 2012–2019
Dichloroacetic Acid
5.21 µg/L
No EPA limit set
worst single sample: 5.6 µg/L
3/12 SYR4 2012–2019
Bromoform
3.53 µg/L
No EPA limit set
worst single sample: 3.6 µg/L
2/12 SYR4 2012–2019
Combined Uranium
5.12634 µg/L 17%
of the EPA limit 30 µg/L
worst single sample: 5.1852 µg/L
2/2 SYR4 2012
Dibromoacetic Acid
4.165 µg/L
No EPA limit set
worst single sample: 4.3 µg/L
2/12 SYR4 2012–2019
Trichloroacetic Acid
1.6 µg/L
No EPA limit set
 1/12 SYR4 2012–2019
41 contaminants tested, none detected
1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2,4-Trichlorobenzene1,2-Dichloroethane1,2-DichloropropaneAntimony, TotalAtrazineBenzeneBenzo(A)PyreneBeryllium, TotalChlorobenzeneCopperCyanideCadmiumCarbon TetrachlorideChromiumDichloromethaneDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateEthylbenzeneHexachlorobenzeneHexachlorocyclopentadieneLeadMercuryMonobromoacetic AcidMonochloroacetic AcidNitriteSeleniumSimazineStyreneTetrachloroethyleneThallium, TotalTolueneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact
RUEDAS, DANIELLE
Phone
805-473-7156
Email
druedas@co.slo.ca.us

Frequently asked questions about Slo Csa No. 16 - Shandon

Is Slo Csa No. 16 - Shandon tap water safe to drink?

EPA monitoring detected 16 contaminants in Slo Csa No. 16 - Shandon'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 Slo Csa No. 16 - Shandon's water?

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

How many people does Slo Csa No. 16 - Shandon serve?

Slo Csa No. 16 - Shandon reports serving 1,085 people in California, per its EPA record.

Has Slo Csa No. 16 - Shandon had any water quality violations?

The EPA has no formal drinking-water violations on file for Slo Csa No. 16 - Shandon.

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.