OPINION
ROTH, Circuit Judge.Plaintiffs Lad J. Bell and Michael A. DePompeo appeal from the April 4, 2001, Order of the United States District Court for the District of New Jersey, dismissing their Amended Complaint pursuant to Federal Rule of Civil Procedure 12(b)(6). For the reasons stated below, we will reverse the order and remand this ease to the District Court for further proceedings.
The facts described herein are taken, as they must be taken, entirely from the Amended Complaint. For the purposes of reviewing the District Court’s dismissal, we must accept as true all facts alleged in the Amended Complaint and draw all reasonable inferences arising from those facts in plaintiffs’ favor. See Schrob v. Catterson, 948 F.2d 1402, 1405 (3d Cir.1991). We exercise plenary review over the Rule 12(b)(6) dismissal, see, e.g., Ditri v. Coldwell Banker Residential Affiliates, 954 F.2d 869, 871 (3d Cir.1992), and we must affirm “only if it appears certain that no relief could be granted to [Plaintiffs] under any set of facts which could be proven.” Shubert v. Metrophone, Inc., 898 F.2d 401, 403 (3d Cir.1990).
Bell and DePompeo have been employed as firefighters by the Teaneck Fire Department (TFD) since 1987 and 1980, respectively. Plaintiffs allege that defendants, the Township of Teaneck and certain individual agents of Teaneck and TFD, retaliated against them for engaging in various Constitutionally-protected activities. Plaintiffs bring these claims under 42 U.S.C. §§ 1983 and 1985, 18 U.S.C. § 1962, the First, Fourth and Fourteenth Amendments to the United States Constitution, the Conscientious Employee Protection Act, N.J. Stat. §§ 34:19-1 to -8 (2002), and the New Jersey common law theories of intentional and negligent infliction of emotional distress.
Both the protected activities and the alleged retaliation differ with respect to each of the plaintiffs. With respect to Bell, the Amended Complaint alleges that defendants retaliated in response to Bell engaging in the following four activities:
(1) supporting fellow firefighter William F. Brennan in a 1993 bid for union secretary;
(2) offering a deposition, an affidavit, and testimony between 1997 and 2000 in sup*154port of Brennan’s federal suit against the defendants;1 (3) opposing a decision to close fire stations and complaining of fire station safety hazards in statements to the media; and (4) complaining of safety hazards to Teaneck council members. Defendants allegedly retaliated against Bell between October 1995 and October 2000 by prohibiting him from attending a training class, assigning him less desirable work, requiring him to file a grievance to collect pay for time spent testifying in Brennan’s suit, ordering that phone calls be made to the fire station while Bell and Brennan slept there, disciplining Bell disproportionately for various infractions, and depriving Bell of overtime pay and sick leave.
DePompeo’s allegedly protected activities include his continued friendship and association with Brennan and Bell as well as his legal action against defendants, which followed his February 1996 report of a fire station asbestos hazard. DePompeo alleges that the defendants retaliated against him by denying him leave, depriving him of vacation days earned, giving him an unsatisfactory progress report “in bad faith and without any basis in fact” and refusing to promote him.
After plaintiffs filed their original complaint on November 29, 2000, defendants filed a motion to dismiss for failure to state a claim upon which relief could be granted. See Fed.R.Civ.P. 12(b)(6). In lieu of filing a responsive motion, plaintiffs amended their complaint to allege with more particularity the facts described above and to advance a separate claim under 18 U.S.C. § 1962(c) (Civil RICO Claim).
On April 4, 2001, the District Court granted defendants’ motion and entered an order, dismissing with prejudice all of the federal claims listed in the Amended Complaint except the Civil RICO Claim.2 The District Court then declined to exercise supplemental jurisdiction over the remaining New Jersey law claims, pursuant to 28 U.S.C. § 1367(c).
In an opinion accompanying the order, the District Court analyzed plaintiffs’ First Amendment retaliation claim under Green v. Philadelphia Housing Auth, 105 F.3d 882 (3d Cir.1997). In Green, we held:
A public employee’s claim of retaliation for engaging in a protected activity is analyzed under a three-step process .... A plaintiff must first demonstrate the activity in question was protected. Second, the plaintiff must show the protected activity was a substantial or motivating factor in the alleged retaliatory action.... Finally, defendants may defeat plaintiffs claim by demonstrating “that the same action would have been taken even in the absence of the protected conduct.”
105 F.3d at 885 (citations omitted). Applying Green, the District Court determined that Plaintiffs failed to satisfy the first two steps. We conclude that by doing so, it erred.
The District Court first held as a matter of law that the plaintiffs’ activities were not protected by the First Amendment because they did not relate to “any matter of political, social, or other concern to the community.” Bell v. Ostrow, 00-5851 (D.N.J.2001), Appendix at 11 (citing Green, 105 F.3d at 886). In doing so, however, the District Court did not draw in the plaintiffs’ favor all reasonable inferences from the facts alleged in the Amended Complaint. Given the facts alleged, we find it reasonable to infer, for example, that public speech about safety or asbestos hazards is a matter of public concern.
*155Next, the District Court concluded that the plaintiffs had not sufficiently alleged that the protected activity was a “substantial or motivating factor” of the claimed retaliation. While proving this element at trial may be difficult — and, perhaps, impossible — -for the plaintiffs, the plaintiffs’ pleadings are sufficient to survive defendants’ motion to dismiss.3 It is reasonable to infer from the relative timing of the protected activities and the alleged retaliation that the former did, indeed, motivate the latter.
Finally, we find that the District Court also erred by treating the two-year statute of limitations for Section 1983 claims as a bar to plaintiffs’ claims without addressing the “continued violation” doctrine. As we stated in Cowell v. Palmer Tp., 263 F.3d 286 (3d Cir.2001), the two-year statute of limitations does not bar a Section 1983 claim based on more remote conduct if there has been a “continuing violation.”
In order to benefit from the doctrine, a plaintiff must establish that the defendant’s conduct is “more than the occurrence of isolated or sporadic acts.” ... Regarding this inquiry, we have "recognized that courts should consider at least three factors: (1) subject matter— whether the violations constitute the same type of discrimination, tending to connect them in a continuing violation; (2) frequency — whether the acts are recurring or more in the nature of isolated incidents; and (3) degree of permanence — whether the act had a degree of permanence which should trigger the plaintiffs awareness of and duty to assert his/her rights and whether the consequences of the act would continue even in the absence of a continuing intent to discriminate.
263 F.3d at 292 (quoting West v. Philadelphia Elec. Co., 45 F.3d 744, 755 (3d Cir.1995)). Although plaintiffs had raised this theory before the District Court, the District Court in its decision to dismiss the Amended Complaint did not address the possibility of a “continuing violation” exception to the Section 1983 statute of limitations. We will remand the case for such an inquiry.
For the above reasons, we will reverse the dismissal of the Amended complaint and remand this case to the District Court for proceedings consistent with our holding.
. See Brennan v. Norton, 174 N.J. 185, 803 A.2d 1159 (2002).
. The RICO claim was subsequently withdrawn by the plaintiffs.
. During oral argument, defendants’ counsel suggested that evidence might reveal inconsistencies in the plaintiffs’ position on this and other proofs. Although we hold in Plaintiffs’ favor on the issue of Rule 12(b)(6) dismissal, we strongly caution plaintiffs against pursuing contentions which do not have factual validity.