Costa d'Oro Olive Oil: The Umbrian PDO, and What It Actually Guarantees
Costa d'Oro olive oil turns up in two quite different places, and they are not the same product. One is an everyday Italian extra virgin sold in litre bottles and squeeze packs. The other is a small limited bottle carrying a protected designation of origin and a geographical mention printed across the front — and that second bottle comes with a guarantee the first one does not. Costa d'Oro S.p.A. is based at Spoleto in Umbria, and the footer of its own website carries the line A Company of Avril, the French agricultural and food group. What follows is read from the company's own pages and from the Umbria PDO production specification, rather than from the marketing.
For our own oil, see our cold-pressed organic Marrakech olive oil.
The Short Answer
- Costa d'Oro S.p.A. is an Umbrian olive oil company based at Spoleto. Its own site footer carries the mark A Company of Avril, and its commitment page describes Serving the Earth as "Group Avril's purpose".
- Costa d'Oro publishes an actual table of numbers for one line. Its 100% Italiano page sets out eight parameters against DNV's STP 8 certification and states that the oil "is certified to contain at least 150 mg/kg of polyphenols". That is a better disclosure than most of this category manages, and we credit it plainly.
- The Umbria PDO sets five different polyphenol floors — one for each of its five geographical mentions. Colli Assisi-Spoleto, which is the mention on Costa d'Oro's PDO bottle, is the highest of the five at not less than 150 ppm. Colli Martani is 125 ppm; the other three are 100 ppm.
- The plain extra virgin grade, by contrast, sets no polyphenol minimum at all. A PDO specification is one of very few documents in this category that puts a floor under the number.
- A floor is not a measurement. Neither the PDO minimum nor the STP 8 minimum tells you what your particular bottle contains — only that it cleared a threshold at certification.
- Sidr & Stone's own olive oil is single-estate Moroccan, rain-fed, organically grown and cold-pressed within hours of harvest. We do not publish a polyphenol figure yet, and we say so rather than describing our way around it.
Who Costa d'Oro Is, and Who Owns It
The brand takes its name from the land rather than from a family. Costa d'Oro's English pages explain that "in our dialect, Costa means 'hill'", and its PDO bottle describes oil "cold-extracted from olives of the Assisi-Spoleto subzone, named after the olive-growing belt we proudly call the 'Costa d'Oro'". The company name and the growing belt are the same phrase.
It is a Spoleto business, but not an independent one. Every page on the company's site carries a Costa d'Oro — A Company of Avril mark in the footer, and the commitment page presents Avril's corporate purpose as its own. That is worth knowing before you picture a small family mill: it does not change where the olives grow, but it does change the mental image, and Costa d'Oro puts it on the page rather than burying it.
The company also states that it holds SA8000 social accountability certification, that it was "one of the first companies of our industry to be DNV-certified", and that over 30% of the electricity it uses comes from photovoltaic generation.
The Range, and Which Bottle Carries Which Claim
Costa d'Oro sorts its own catalogue into five groups: Classics, Classic Plus, unfiltered extra virgin, specials, and ancillaries. The distinction that matters to a buyer is not the marketing tier but what each bottle can be checked against.
- Classics — l'Extra, l'Extra Fruttato Leggero, l'Extra Unfiltered, l'Extra Squeeze, Olivizia and Il Classico di oliva. Note that Il Classico di oliva is olive oil, not extra virgin olive oil. Those are different legal grades, and the label says which is which.
- Classic Plus — Zero, 100% Italiano and il biologico. This is the tier with numbers attached to it.
- Unfiltered — il grezzo, il grezzo biologico, l'Extra Non Filtrato and il tradizionale. The company calls this its flagship and says it launched il GREZZO more than 25 years ago.
- Opere d'Olio PDO Umbria — the limited bottle, unfiltered, 500 ml, carrying the Colli Assisi-Spoleto geographical mention and developed with the producers' association ASSOPROL.
For how origin wording works on any Italian bottle — and why "Italian brand" and "Italian oil" are not the same statement — our guide to Italian olive oil sets out the blend-statement rules in full.
The Umbria PDO Sets Five Different Polyphenol Floors
The Umbria designation cannot be used on its own. It must always be accompanied by one of five geographical mentions, and the production specification sets different chemical and sensory requirements for each. The differences are not decorative: the total polyphenol minimum ranges from 100 ppm to 150 ppm depending on which mention is printed on the bottle.
| Geographical mention | Required aroma | Total polyphenols, minimum |
|---|---|---|
| Colli Assisi-Spoleto | Strong fruity | ≥ 150 ppm |
| Colli Martani | Medium to strong fruity | ≥ 125 ppm |
| Colli Amerini | Medium fruity | ≥ 100 ppm |
| Colli del Trasimeno | Medium to light fruity | ≥ 100 ppm |
| Colli Orvietani | Medium fruity | ≥ 100 ppm |
Costa d'Oro's mention sits at the top of that list, and the specification asks more of it in other ways too: Moraiolo must make up not less than 60% of the fruit for Colli Assisi-Spoleto. The requirements shared across all five mentions are already tighter than the extra virgin grade — maximum acidity 0.65% against 0.80%, peroxide value not more than 12 against 20.0, K232 not more than 2.0 against 2.50, K270 not more than 0.20 against 0.22, and a sensory panel score of at least 7.00. Bottling must take place inside Umbria, containers may not exceed five litres, and the harvest year is compulsory on the label.
The polyphenol line is the one that matters most, because the extra virgin grade sets no polyphenol minimum whatsoever. Our article on Farchioni olive oil works through that same PDO-versus-grade argument for the Colli Martani mention. What reading all five mentions together adds is simply this: the floors are not equal, so the mention is not a decoration.
One honest note on sourcing. We confirmed the designation itself on the EU's eAmbrosia register — Umbria is PDO-IT-1520, a registered food designation, first published in Official Journal L 322 of 25 November 1997. We could not retrieve the register's own specification PDF this run, so the article's per-mention figures come from two independently published reproductions of the Italian Ministerial Decree of 6 August 1998 that approved the specification, which agree with each other on every figure quoted above. Where the two reproductions disagreed — on the direction of the oleic acid limit — we have published nothing. It is also worth knowing that there is no separate olive oil designation called Assisi, Spoleto or Colli Martani: those names appear in the register as wine PDOs, which is an easy and common confusion.
The One Line Where Costa d'Oro Publishes Numbers
Most olive oil brands publish adjectives. Costa d'Oro publishes a table — for one line. Its 100% Italiano page sets out eight parameters against DNV's STP 8 certification for low-acidity extra virgin olive oil, alongside the legal limits, and we reproduce it here as published.
| Parameter | Legal limit | Costa d'Oro STP 8 limit |
|---|---|---|
| Acidity (% oleic acid) | ≤ 0.8 | ≤ 0.6 |
| Peroxide index (meq O₂/kg) | ≤ 20 | ≤ 15 |
| Beta-sitosterol (% of sterols) | Over 93 | Over 94 |
| K232 | ≤ 2.5 | ≤ 2.25 |
| K270 | ≤ 0.22 | ≤ 0.18 |
| Total polyphenols (mg/kg) | None set | Minimum 150 |
| Median of defects | 0 | 0 |
| Fruity median | > 0 | > 1 |
The company's own note beneath that table is unusually careful: "There is no absolute value that expresses a specific quality value for the oil. 100% Italian Costa d'Oro oil is certified to contain at least 150 mg/kg of polyphenols." That is both a real disclosure and an accurate framing of what it means, and we are not going to downplay either.
Two things follow. The first is that a named third-party certifier, a stated standard and eight published parameters put Costa d'Oro well ahead of most of the shelf on this one line. The second is that these are limits, not results. A certified floor of 150 mg/kg tells you the oil cleared that threshold; it does not tell you what your bottle measured, and polyphenol content falls with time in the bottle. Our guide to high phenolic olive oil goes through how to read a figure like this properly.
And a boundary worth stating plainly: the table covers 100% Italiano. The Opere d'Olio PDO Umbria bottle, il grezzo and the Classics carry no equivalent published table. For the PDO bottle, the specification's own 150 ppm floor does that work instead — the same number reached by two entirely independent routes, which is a genuinely interesting coincidence rather than a claim either document makes about the other.
Unfiltered by Settling, Not by Filter
Costa d'Oro's method page is worth reading because it explains what "unfiltered" means at industrial scale. The company describes continuous pressing using both hammer and disk crushers, malaxation for about 40 minutes at temperatures it says do not exceed 27°C, and then — in place of filtration — several days of natural settling at controlled temperature, so that fine solids drop out before bottling.
That is a legitimate route to an unfiltered oil, and it is the same principle as a small mill letting oil rest in a tank, run at a different scale. Our piece on unfiltered versus filtered olive oil sets out the trade-off between the two styles; neither is simply better than the other.
One note of care. Costa d'Oro describes its unfiltered oils as particularly rich in polyphenols and vitamins with a distinctive nutritional profile. We are not going to repeat that as a health claim, and no figure is attached to it on those pages. Where a number does exist — the 150 mg/kg on 100% Italiano — the company gives it. Where it does not, the description is standing on its own.
The Objections Worth Taking Seriously
"It is owned by a French group, so 'Umbrian' is just branding now." Ownership is a fair thing to notice, and Costa d'Oro puts it on its own footer rather than hiding it. But it does not touch the checkable parts. A PDO mention certifies where the fruit grew and what the oil had to test at; a DNV certification is issued by DNV. Neither depends on who holds the shares. What ownership does change is the picture in your head, which is why we said it early rather than late.
"A minimum is not a measurement." Correct, and it is the most important limitation in this article. Both numbers here are floors. They are far stronger than an adjective, but a floor tells you what an oil is not allowed to be, not what it is. A per-lot certificate of analysis carrying a measured figure and a date would be better, and almost nobody in this part of the market publishes one as a matter of routine.
"Is per-lot traceability just a gimmick?" It can be. Costa d'Oro runs two systems: a batch-number lookup for 100% Italiano, il grezzo and il grezzo biologico, and a separate blockchain-backed tracker covering four further lines. Whether it is useful depends entirely on what the lookup returns for the lot code on your own bottle. We flag it as a real practice worth testing with a bottle in hand, rather than claiming more for it than we were able to confirm.
Why Sidr & Stone
We write brand articles like this one because the alternative — a page of restated marketing copy — helps nobody. Where a brand publishes something we do not, we say so. Costa d'Oro publishes an eight-parameter table with a named certifier on one of its lines, and that is two things we do not yet match.
| What a buyer wants to know | Costa d'Oro | Sidr & Stone |
|---|---|---|
| Free acidity | Published as a certification limit (≤ 0.6%) on 100% Italiano | Not published |
| Total polyphenols | Certified floor of 150 mg/kg on 100% Italiano; no figure on other lines | Not published |
| Peroxide value | Published as a limit (≤ 15) on 100% Italiano | Not published |
| Named third-party certifier | DNV, to the STP 8 standard | Not published |
| Cultivars | Published for the PDO bottle: Moraiolo 60%, Frantoio and Leccino 30%, others 10% | Not published |
| Per-lot lookup | Batch-number lookup on three lines, blockchain tracker on four more | No |
| Origin | Italy, and the PDO subzone where the mention is used | One family-owned grove near Marrakech, Morocco |
Our own oil is straightforward, and here is the whole of it:
- Single-estate — one family-owned grove on the plains outside Marrakech, Morocco, with no blending across origins.
- Rain-fed — no irrigation; the trees take what the season gives them.
- Organically grown — no synthetic fertilisers, pesticides or herbicides. We do not hold a formal organic certificate and we do not claim one.
- Single harvest — a small batch, once a season, picked when the season says the fruit is ready, which can be weeks later than neighbouring farms.
- Cold-pressed within hours of harvest — flavour, aroma and polyphenols preserved by keeping the gap between picking and pressing short.
- Unfiltered extra virgin — minimally processed, and it may show natural sediment, which is normal in an honest unfiltered oil.
- 100% natural — one ingredient, with nothing added.
- 500 ml dark glass with a gold label — protective packaging in a size built to be finished while it is still fresh.
- Halal certified, with 10% of profits to charity as a brand-wide commitment, and fulfilment in the UK, EU, and US.
We will not tell you Sidr & Stone is the best olive oil — that would be the very claim this article warns against. What we will say is that our oil is single-estate Moroccan, rain-fed, organically grown and cold-pressed within hours of harvest, and that our laboratory panel is not published yet. When it is, it will sit on this page with a number on it, in the same way Costa d'Oro names DNV.
Frequently Asked Questions
What is Costa d'Oro olive oil?
Costa d'Oro is an Italian olive oil company based at Spoleto in Umbria, selling everyday extra virgin lines, an unfiltered range it calls its flagship, and a limited PDO Umbria bottle. Its own website footer identifies it as a company of the French group Avril.
Is Costa d'Oro olive oil good quality?
On the evidence the company itself publishes, its 100% Italiano line is certified by DNV to limits tighter than the legal extra virgin standard on seven parameters, including a polyphenol floor of 150 mg/kg. The other lines carry no published table, so they have to be judged on grade, freshness and taste like any other bottle.
What does the DOP Umbria on a Costa d'Oro bottle mean?
It means the oil meets the Umbria protected designation of origin specification for a named subzone — in Costa d'Oro's case, Colli Assisi-Spoleto. That subzone requires at least 60% Moraiolo, a strong fruity aroma, a sensory panel score of at least 7.00, and total polyphenols of not less than 150 ppm.
Is Costa d'Oro olive oil filtered or unfiltered?
Both, depending on the line. The company describes unfiltered oil as its flagship and reaches it by several days of natural settling at controlled temperature rather than by filtration. Other lines in the range are conventional filtered extra virgin.
Who owns Costa d'Oro?
Costa d'Oro S.p.A. carries a A Company of Avril mark on its own website footer, and its commitment page presents the Avril group's corporate purpose as its own. Avril is a French agricultural and food group.
Does Costa d'Oro publish a polyphenol figure?
It publishes a certified minimum, not a measured result, and only for one line. The 100% Italiano page states the oil is certified to contain at least 150 mg/kg of polyphenols. Most olive oil brands publish no polyphenol number at all, so this is a genuine point of difference rather than a category norm.
How does Sidr & Stone's olive oil compare?
Ours is a single-estate Moroccan extra virgin oil from one family-owned grove near Marrakech — rain-fed, organically grown, cold-pressed within hours of harvest, and unfiltered. Costa d'Oro publishes a certified parameter table on one line and we do not publish a laboratory panel yet; that is an honest difference and we state it rather than working around it.
Is olive oil a medicine?
No. Olive oil is a food, not a medicine. It has a long traditional history — including being honoured in the Prophetic Sunnah — and a substantial body of modern research, particularly around polyphenols, cardiovascular health, and the Mediterranean diet pattern. It can be a worthwhile part of a healthy routine, but it does not cure diseases and is not a substitute for medical care. Be cautious of any olive oil marketed with specific disease-cure claims.
Final Thoughts
The useful thing about Costa d'Oro is not the brand story. It is that somewhere on the site there is a table, and somewhere in the register there is a specification, and between them a reader can actually check something. That is rarer than it should be. Most of this category asks you to take flavour adjectives on trust.
What the two documents share is a shape rather than a promise: both set a floor. Neither tells you what is in the bottle in front of you. If you want the Umbrian oil with the strongest guarantee behind it, the mention on the label is the thing to read — Colli Assisi-Spoleto asks for more than the other four. If you want the line with published chemistry, that is 100% Italiano, and it is a different bottle.
Our own position is the plain one. We can tell you where every olive came from, when it was picked and how quickly it was pressed, and we cannot yet hand you a number. We would rather say that than dress a description up as data.
Our cold-pressed organic Marrakech olive oil — single-estate, rain-fed, organically grown and cold-pressed within hours of harvest — is available to pre-order, with fulfilment in the UK, EU, and US. First harvest, estimated shipping from November 2026. For the practical version of everything above, see our guide to choosing a quality olive oil.
Pre-Order Sidr & Stone Organic Marrakech Olive Oil — Limited First Harvest →
Disclaimer: This article describes brand practices, product ranges and regulatory specifications as published at the time of writing on 26 August 2026; specifications and brand practices may change, and readers should check current sources. The Umbria PDO per-mention figures quoted here were read from public reproductions of the approving Italian Ministerial Decree rather than from the EU register's own specification document, which we could not retrieve. Comparisons are made in good faith and in fair terms. References to Costa d'Oro, Avril, DNV and ASSOPROL describe publicly published information and are not affiliated with or endorsed by them. Olive oil is a food, not a medicine, and is not a substitute for medical treatment of any condition. For any health concern, consult a qualified medical professional.