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Tap water quality report

Oceanside, City of

EPA monitoring tested this supplier for 111 contaminants and detected 24. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

111
contaminants tested
24
detected
171,483
people served
5
health-based violations
California rankingsLead in CaliforniaPFAS in California
Water source
SWP
Ownership
Local government
Counties served
San Diego

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.

5
health-based violations
7
violations on file
0
still open
ViolationTypeStatusPeriod
TT Health-based Resolved 2005-03-01 → 2005-03-31
TT Health-based Resolved 2005-03-01 → 2005-03-31
TT Health-based Resolved 1996-05-01 → 1996-08-02
TT Health-based Resolved 1996-05-01 → 1996-08-02
TT Health-based Resolved 1996-05-01 → 1996-08-02
MR Monitoring Resolved 2013-10-01 → 2013-10-31
MR Monitoring Resolved 2013-10-01 → 2013-10-31

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 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
13805 µg/L 138%
of the EPA limit, at the 95th percentile of samples — 10000 µg/L
worst single sample: 23600 µg/L
558/780 SYR4 2012–2019
Fluoride
395.35 µg/L 9.9%
of the EPA limit 4000 µg/L
worst single sample: 759 µg/L
374/380 SYR4 2012–2019
TTHM
60.785 µg/L 76%
of the EPA limit 80 µg/L
worst single sample: 76.2 µg/L
262/288 SYR4 2012–2019
Bromoform
8.96 µg/L
No EPA limit set
worst single sample: 11.1 µg/L
249/283 SYR4 2012–2019
Dibromochloromethane
19.385 µg/L
No EPA limit set
worst single sample: 21.7 µg/L
244/285 SYR4 2012–2019
Total Haloacetic Acids (HAA5)
28 µg/L 47%
of the EPA limit 60 µg/L
worst single sample: 48.8 µg/L
241/241 SYR4 2012–2019
Bromodichloromethane
20.34 µg/L
No EPA limit set
worst single sample: 27.6 µg/L
239/288 SYR4 2012–2019
Chloroform
18.61 µg/L
No EPA limit set
worst single sample: 26.1 µg/L
239/288 SYR4 2012–2019
Dichloroacetic Acid
14.14 µg/L
No EPA limit set
worst single sample: 16.5 µg/L
237/241 SYR4 2012–2019
Dibromoacetic Acid
7.315 µg/L
No EPA limit set
worst single sample: 9.9 µg/L
218/229 SYR4 2012–2019
Nitrate-Nitrite
11250 µg/L 113%
of the EPA limit, at the 95th percentile of samples — 10000 µg/L
worst single sample: 22700 µg/L
215/309 SYR4 2012–2019
Trichloroacetic Acid
6.535 µg/L
No EPA limit set
worst single sample: 7.3 µg/L
194/221 SYR4 2012–2019
1,2-Dichloropropane
0.8850 µg/L 18%
of the EPA limit 5 µg/L
worst single sample: 1.4 µg/L
106/1335 SYR4 2012–2019
Nitrite
390.15 µg/L 39%
of the EPA limit 1000 µg/L
worst single sample: 823 µg/L
68/362 SYR4 2012–2019
Combined Uranium
33.674 µg/L 112%
of the EPA limit, at the 95th percentile of samples — 30 µg/L
worst single sample: 41.72 µg/L
35/41 SYR4 2012–2019
Monochloroacetic Acid
20.72 µg/L
No EPA limit set
worst single sample: 22.9 µg/L
34/163 SYR4 2012–2019
Barium
179.5 µg/L 9%
of the EPA limit 2000 µg/L
worst single sample: 180 µg/L
22/37 SYR4 2012–2019
Lead
0.0 mg/L 0%
of the EPA limit 0.0150 mg/L
 18/18 LCR 2024
Lithium
38 µg/L
No EPA limit set
 4/6 UCMR-5 2024
Monobromoacetic Acid
2.77 µg/L
No EPA limit set
worst single sample: 2.8 µg/L
3/153 SYR4 2012–2019
Arsenic
2 µg/L 20%
of the EPA limit 10 µg/L
 1/39 SYR4 2012–2019
Chromium
53 µg/L 53%
of the EPA limit 100 µg/L
 1/48 SYR4 2012–2019
Toluene
21 µg/L 2.1%
of the EPA limit 1000 µg/L
 1/214 SYR4 2012–2019
Trichloroethylene
2.7 µg/L 54%
of the EPA limit 5 µg/L
 1/214 SYR4 2012–2019
87 contaminants tested, none detected
1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2,4-Trichlorobenzene1,2-DIBROMO-3-CHLOROPROPANE1,2-Dichloroethane11Cl-PF3OUdS2,3,7,8-TCDD2,4,5-TP2,4-D4:2 Fts6:2 Fts8:2 Fts9Cl-PF3ONSAdonaAntimony, TotalAsbestosAtrazineBhc-GammaBenzeneBenzo(A)PyreneBeryllium, TotalChlorobenzeneCopperCyanideCadmiumCarbofuranCarbon TetrachlorideChlordaneDichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDinosebDiquatEthylene DibromideEndothallEndrinEthylbenzeneGlyphosateHexachlorobenzeneHfpo-DaHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoLeadMercuryMethoxychlorNetfosaaNfdhaNmefosaaOxamylPfbaPFBSPfdaPfdoaPfeesaPfhpaPfhpsPfhxaPFHXSPfmbaPfmpaPFNAPFOAPFOSPfpeaPfpesPftaPftrdaPfunaPentachlorophenolPicloramSeleniumSimazineStyreneTetrachloroethyleneThallium, TotalTotal Polychlorinated Biphenyls (PCB)ToxapheneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact
MAYO, FREDERICK
Phone
760-435-5827
Email
[email protected]

Frequently asked questions about Oceanside, City of

Is Oceanside, City of tap water safe to drink?

EPA monitoring detected 24 contaminants in Oceanside, City of'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 Oceanside, City of's water?

EPA monitoring detected Nitrate, Fluoride, TTHM, Bromoform, Dibromochloromethane, and others. The full list with the level and data source for each is above.

How many people does Oceanside, City of serve?

Oceanside, City of reports serving 171,483 people in California, per its EPA record.

Has Oceanside, City of had any water quality violations?

The EPA has 7 violations on file for Oceanside, City of, of which 5 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.