Olive Garden restaurants in California began posting warning signs inside lobbies this past weekend telling customers that food and beverages they sell may contain certain chemicals that could be dangerous to their health.

The Italian casual dining chain, operated by Darden Restaurants, started posting warning signs approved by the attorney general at a meeting last Thursday with various representatives of the state’s restaurant industry, Darden’s Director of Media and Communications Mike Bernstein told The Wave Monday

Darden Restaurants, Landry’s Restaurants, and 14 other parent companies of restaurant chains doing business in the state of California, were sued on April 10 by the state’s attorney general for failing to warn consumers about the dangers of mercury found in certain seafoods they sell.

Two complaints alleged the restaurants violated the Safe Drinking Water and Toxic Enforcement Act of 1986, better known as Proposition 65.

The California Restaurant Association urged members not to waste any time in tacking up the approved, 'safe-harbor' warning sign.

Click here to see a full size image of the restaurant warning sign.

“CRA recommends all restaurants, especially those serving fish and seafood, post this warning in your establishment immediately,” urged the association on its Website.

But Thomas Dresslar, spokesperson for Attorney General Bill Lockyer, pointed out that restaurants have a choice of either posting the ‘safe-harbor’ warning sign or the interim warning sign now posted by California retailers warning customers of the dangers of mercury sold in certain species of seafood.

The attorney general has ordered seven retailers - Safeway, Kroger, Albertson's, Trader Joe's, Costco, Andronico’s Markets, and Whole Foods - to warn customers that tuna, swordfish and shark sold in their markets contain methyl mercury, listed by the state as a compound known to cause cancer and reproductive harm.

Click here to see a full size image of the retail warning sign.

A settlement in the case of the retailers is still pending.

Red Lobster restaurants in the state, also owned by Orlando-based Darden Restaurants, will not be posting the signs, Bernstein said, as the units do not “currently serve” those species.

An Olive Garden in Whittier, Calif., has its warning sign posted in the lobby near the health department certificate, as does a sister unit in Burbank, The Wave confirmed Monday.

Despite the specific nature of the attorney general's complaint filed against the restaurants, as it only pertains to a select group of finfish, restaurants such as Olive Garden are posting the 'safe-harbor' warning signs.

Unlike the species-specific wording in the retailers' interim warning sign, the 'safe harbor' sign alerts diners to the fact that "chemicals known to the state of California to cause cancer, or birth defects or other reproductive harm may be present in foods or beverages sold or served here."

Olive Garden offers just one questionable dinner entrée: swordfish piccata, a $15.25 dinner entrée served in a white wine lemon sauce along with freshly roasted vegetables.

Restaurants are not advised to make any word additions or alterations to either sign before posting, CRA said, as doing so could be noncompliant with the law.

The U.S. Food and Drug Administration in 2001 advised pregnant women, and women of child-bearing age who may become pregnant, to not eat swordfish or shark because they contain high levels of methylmercury.

Just recently, the California Medical Association recommended that fresh and canned fish carry labels warning about the danger of exposure to high levels of mercury.

Houston-based Landry’s Seafood Restaurants operates several Chart House restaurants in California. Since the April 10 filing, in which the seafood chain is named, Landry’s “pulled some of the fish [off menus] in the interim”, Steve Scheinthal, general counsel for Landry’s Restaurant’s Inc., told The Wave Monday.

According to Scheinthal, Chart House sold only two species named in the complaint: swordfish and tuna. Swordfish was taken off the menu at restaurant because it “wasn’t a big seller.”

Another restaurant, Scheinthal said, does run daily seafood specials that may include fish named in the complaint but no decision has been made to date whether to keep certain species off the menu.

He added that he was aware of Thursday’s meeting with the attorney general but was waiting for a 4 pm EST conference call Monday with company attorneys to learn more details.

Some of the restaurant chains included in the lawsuits are:

Warning signs showing up in California restaurants