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Riverside Csa #122-mesa Verde

EPA monitoring tested this supplier for 110 contaminants and detected 15. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

110
contaminants tested
15
detected
766
people served
327
health-based violations
California rankingsLead in CaliforniaPFAS in California
Water source
Ground water
Ownership
Local government
Counties served
Riverside

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.

327
health-based violations
364
violations on file
0
still open
ViolationTypeStatusPeriod
MCL Health-based Resolved 2008-05-01 → 2008-05-31
MCL Health-based Resolved 2008-05-01 → 2008-05-31
MCL Health-based Resolved 2008-04-01 → 2008-04-30
MCL Health-based Resolved 2008-04-01 → 2008-04-30
MCL Health-based Archived 1989-12-01 → 1989-12-31
MCL Health-based Archived 1989-11-01 → 1989-11-30
MCL Health-based Archived 1989-10-01 → 1989-10-31
MCL Health-based Archived 1989-09-01 → 1989-09-30
MCL Health-based Archived 1989-08-01 → 1989-08-31
MCL Health-based Archived 1989-07-01 → 1989-07-31

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
840 µg/L 8.4%
of the EPA limit 10000 µg/L
 28/30 SYR4 2012–2019
Lead
0.0 mg/L 0%
of the EPA limit 0.0150 mg/L
 18/18 LCR 2022
Bromoform
7.715 µg/L
No EPA limit set
worst single sample: 8.1 µg/L
8/11 SYR4 2012–2019
Dibromochloromethane
2.865 µg/L
No EPA limit set
worst single sample: 2.9 µg/L
8/11 SYR4 2012–2019
TTHM
11.3 µg/L 14%
of the EPA limit 80 µg/L
worst single sample: 12 µg/L
8/8 SYR4 2015–2019
Combined Uranium
9.61646 µg/L 32%
of the EPA limit 30 µg/L
worst single sample: 10.1022 µg/L
5/5 SYR4 2012–2017
Fluoride
2480 µg/L 62%
of the EPA limit 4000 µg/L
worst single sample: 2600 µg/L
4/4 SYR4 2012–2017
Arsenic
14.36 µg/L 144%
of the EPA limit, at the 95th percentile of samples — 10 µg/L
worst single sample: 15 µg/L
3/4 SYR4 2012–2017
Bromodichloromethane
0.6390 µg/L
No EPA limit set
worst single sample: 0.6400 µg/L
3/11 SYR4 2012–2019
Gross Beta Particle Activity
4 pCi/L
No EPA limit set
 3/3 SYR4 2017
Selenium
22.58 µg/L 45%
of the EPA limit 50 µg/L
worst single sample: 24 µg/L
3/4 SYR4 2012–2017
Chromium
7.275 µg/L 7.3%
of the EPA limit 100 µg/L
worst single sample: 7.6 µg/L
2/4 SYR4 2012–2017
Dibromoacetic Acid
1 µg/L
No EPA limit set
 2/8 SYR4 2015–2019
Lithium
159 µg/L
No EPA limit set
 2/2 UCMR-5 2025
Barium
23 µg/L 1.2%
of the EPA limit 2000 µg/L
 1/4 SYR4 2012–2017
95 contaminants tested, none detected
1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2,4-Trichlorobenzene1,2-DIBROMO-3-CHLOROPROPANE1,2-Dichloroethane1,2-Dichloropropane11Cl-PF3OUdS2,3,7,8-TCDD2,4,5-TP2,4-D4:2 Fts6:2 Fts8:2 Fts9Cl-PF3ONSAdonaAntimony, TotalAtrazineBhc-GammaBenzeneBenzo(A)PyreneBeryllium, TotalChlorobenzeneCopperCyanideCadmiumCarbofuranCarbon TetrachlorideChlordaneChloroformDichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDichloroacetic AcidDinosebDiquatEthylene DibromideEndothallEndrinEthylbenzeneGlyphosateHexachlorobenzeneHfpo-DaHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoLeadMercuryMethoxychlorMonobromoacetic AcidMonochloroacetic AcidNetfosaaNfdhaNmefosaaNitriteOxamylPfbaPFBSPfdaPfdoaPfeesaPfhpaPfhpsPfhxaPFHXSPfmbaPfmpaPFNAPFOAPFOSPfpeaPfpesPftaPftrdaPfunaPentachlorophenolPicloramSimazineStyreneTetrachloroethyleneThallium, TotalTolueneTotal Haloacetic Acids (HAA5)Total Polychlorinated Biphenyls (PCB)ToxapheneTrichloroacetic AcidTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact
MEDINA, DANIEL C.
Phone
760-921-2487
Email
DCMedina@rivco.org

Frequently asked questions about Riverside Csa #122-mesa Verde

Is Riverside Csa #122-mesa Verde tap water safe to drink?

EPA monitoring detected 15 contaminants in Riverside Csa #122-mesa Verde'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 Riverside Csa #122-mesa Verde's water?

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

How many people does Riverside Csa #122-mesa Verde serve?

Riverside Csa #122-mesa Verde reports serving 766 people in California, per its EPA record.

Has Riverside Csa #122-mesa Verde had any water quality violations?

The EPA has 364 violations on file for Riverside Csa #122-mesa Verde, of which 327 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.